Recent media coverage has focused on the potential for unique COVID-19 risks faced by smokers and vapers.

Some of these conclusions could not be supported by data, leading to public health inquiries focused on the following questions:

  • Does smoking or vaping change the risk of contracting the COVID-19 disease caused by the virus?
  • Does smoking or vaping create underlying vulnerabilities (e.g. pre-existing lung conditions) or resilience that make the disease more serious or lethal or less serious for those who do contract it?
  • Does smoking or vaping change the way the disease is transmitted from person to person - does smoking or vaping make people more or less infectious?
  • Does switching from smoking to vaping, or quitting completely, change the profile of the risks to the individual?

Answers to those questions will provide critical evidence necessary to inform policies and guide appropriate communications to current tobacco users.

We have identified approximately 385 publicly available studies on COVID-19 hospitalizations where smoking status is available to help address some of these questions.

Preliminary Publicly Available Studies on COVID-19 & Tobacco Use

Information updated as of 11/19/21. COVID-19 science is rapidly developing. Study conclusions may be limited due to non-peer reviewed status or limited sample size.

Date Title Authors Geography Vaping Data
10/3/2021 Association of Health Status and Nicotine Consumption with SARS-CoV-2 positivity rates. Duszynski TJ, Fadel W, Wools-Kaloustian KK, Dixon BE, Yiannoutsos C, Halverson PK, Menachemi N. United Kingdom With respect to nicotine consumption, whereas smoking cigarettes (daily or on some days) was inversely associated with infection rates (OR = 0.49, 95% CI: 0.32–0.74); the use of chewing tobacco products was positively associated with infection (OR = 2.17, 95% CI: 1.26–3.72). The use of vaping/e-cigarettes was not associated with infection rates (OR = 0.654, 95% CI: 0.32–1.35).
9/28/2021 Impact of smoking, COPD and comorbidities on the mortality of COVID-19 patients. Lacedonia D, Scioscia G, Santomasi C, Fuso P, Carpagnano GE, Portacci A, Mastroianni F, Larizza G, Sabato E, Profilo E, Resta E, Foschino Barbaro MP, Resta O. Italy No Data
9/27/2021 Smoking and COVID-19 outcomes: an observational and Mendelian randomisation study using the UK Biobank cohort. Clift AK, von Ende A, Tan PS, Sallis HM, Lindson N, Coupland CAC, Munafò MR, Aveyard P, Hippisley-Cox J, Hopewell JC. United Kingdom No Data
9/4/2021 Patterns of multimorbidity and risk of severe SARS-CoV-2 infection: an observational study in the U.K. Chudasama YV, Zaccardi F, Gillies CL, Razieh C, Yates T, Kloecker DE, Rowlands AV, Davies MJ, Islam N, Seidu S, Forouhi NG, Khunti K. United Kingdom No Data
9/2/2021 linical and laboratory factors associated with coronavirus disease 2019 (Covid-19): A systematic review and meta-analysis. Minh LHN, Abozaid AA, Ha NX, Le Quang L, Gad AG, Tiwari R, Nhat-Le T, Quyen DK, Al-Manaseer B, Kien ND, Vuong NL, Zayan AH, Nhi LHH, Surya Dila KA, Varney J, Tien Huy N. Worldwide No Data
8/27/2021 COVID-19 patients followed in Portuguese Primary Care: a retrospective cohort study based on the national case series. Tenreiro P, Ramalho A, Santos P. Potugal No Data
8/25/2021 Assessment of Severe COVID-19 Outcomes Using Measures of Smoking Status and Smoking Intensity. Mahabee-Gittens EM, Mendy A, Merianos AL. USA No Data
8/25/2021 COVID-19 in patients with and without cancer: Examining differences in patient characteristics and outcomes. Mohamed NE, Benn EK, Astha V, Shah QN, Gharib Y, Kata HE, Honore-Goltz H, Dovey Z, Kyprianou N, Tewari AK. USA No Data
8/21/2021 Mortality-related risk factors of COVID-19: a systematic review and meta-analysis of 42 studies and 423,117 patients. Dessie ZG, Zewotir T. Multi-national No Data
8/16/2021 Smoking is associated with worse outcomes of COVID-19 particularly among younger adults: a systematic review and meta-analysis. Patanavanich R, Glantz SA. Multi-national No Data
8/11/2021 COVID-19-Associated Mortality in US Veterans with and without SARS-CoV-2 Infection. Suzuki A, Efird JT, Redding TS 4th, Thompson AD Jr, Press AM, Williams CD, Hostler CJ, Hunt CM. USA No Data
8/11/2021 In-depth profiling of COVID-19 risk factors and preventive measures in healthcare workers Wratil PR, Schmacke NA, Osterman A, Weinberger T, Rech J, Karakoc B, Zeilberger M, Steffen J, Mueller TT, Spaeth PM, Stern M, Albanese M, Thun H, Reinbold J, Sandmeyer B, Kressirer P, Grabein B, Falkai P, Adorjan K, Hornung V, Kaderali L, Klein M, Keppler OT. Germany No Data
8/6/2021 Worldwide association of lifestyle-related factors and COVID-19 mortality. Wang J, Sato T, Sakuraba A. Worldwide No Data
8/6/2021 Initial presenting symptoms, comorbidities and severity of COVID-19 patients during the second wave of epidemic in Myanmar Htun YM, Win TT, Aung A, Latt TZ, Phyo YN, Tun TM, Htun NS, Tun KM, Htun KA. Myanmar No Data
8/5/2021 Clinical features and death risk factors in COVID-19 patients with cancer: a retrospective study Zhou Y, Yang Q, Ye J, Wu X, Hou X, Feng Y, Luo B, Li J, Yang G, Li L, Yang X, Wang B, Zhao S, Li L, Li Q, Xu Z, Wu H, Sun J. China No Data
8/5/2021 Questioning the sex-specific differences in the association of smoking on the survival rate of hospitalized COVID-19 patients Khalil A, Dhingra R, Al-Mulki J, Hassoun M, Alexis N. Lebanon No Data
7/28/2021 Clinical characteristics and risk factors of patients with severe COVID-19 in Riyadh, Saudi Arabia: A retrospective study Aleanizy FS, Alqahtani FY, Alanazi MS, Mohamed RAEH, Alrfaei BM, Alshehri MM, AlQahtani H, Shamlan G, Al-Maflehi N, Alrasheed MM, Alrashed A. Saudi Arabia No Data
7/27/2021 Tobacco smoking and severity of COVID-19: Experience from a hospital-based prospective cohort study in Lyon-France Saadatian-Elahi M, Amour S, Elias C, Henaff L, Dananché C, Vanhems P France No Data
7/24/2021 Epidemiological and Clinical Characteristics of Deceased COVID-19 Patients Badedi M, Darraj H, Alnami AQ, Makrami A, Mahfouz MS, Alhazmi K, Mahmoud N, Mosa H. Saudi Arabia No Data
7/23/2021 Association Between Smoking and COVID-19 Severity: Evidence from Bangladesh Mohsin FM, Tonmon TT, Nahrin R, Tithy SA, Ame FA, Ara I, Alam SKT, Pervej AMA, Shahjalal M, Hawlader MDH Bangladesh No Data
7/21/2021 Predictors of COVID-19 in an outpatient fever clinic. Trübner F, Steigert L, Echterdiek F, Jung N, Schmidt-Hellerau K, Zoller WG, Frick JS, Feng YS, Paul G. Germany No Data
7/5/2021 Risk Factors for SARS-CoV-2 Infection, Pneumonia, Intubation, and Death in Northeast Mexico. Cordero-Franco HF, De La Garza-Salinas LH, Gomez-Garcia S, Moreno-Cuevas JE, Vargas-Villarreal J, González-Salazar F. Mexico No Data
7/1/2021 Predictors of Clinical Outcomes in Adult COVID-19 Patients Admitted to a Tertiary Care Hospital in India: an analytical cross-sectional study. Chauhan NK, Shadrach BJ, Garg MK, Bhatia P, Bhardwaj P, Gupta MK, Dutt N, Jalandra RN, Garg P, Nag VL, Sharma P, Bohra GK, Kumar D, Elhence PA, Banerjee M, Mathur D, Purohit AH, Gadepalli R, Sureka B, Misra S. India No Data
6/29/2021 Factors associated with mortality in patients with COVID-19 admitted to intensive care: a systematic review and meta-analysis Taylor EH, Marson EJ, Elhadi M, Macleod KDM, Yu YC, Davids R, Boden R, Overmeyer RC, Ramakrishnan R, Thomson DA, Coetzee J, Biccard BM. Multi-national No Data
6/25/2021 Prognostic factors for adverse outcomes in patients with COVID-19: a field-wide systematic review and meta-analysis Bellou V, Tzoulaki I, van Smeden M, Moons KGM, Evangelou E, Belbasis L. Multi-national No Data
6/25/2021 Outcomes and risk factors for death in patients with coronavirus disease-2019 (COVID-19) pneumonia admitted to the intensive care units of an Egyptian University Hospital. A retrospective cohort study.  Nassar Y, Mokhtar A, Elhadidy A, Elsayed M, Mostafa F, Rady A, Eladawy A, Elshazly M, Saeed M, Mokhtar S, Buschbeck S, Sakr Y. Egypt No Data
6/22/2021 Mortality and critical care unit admission associated with the SARS-CoV-2 lineage B.1.1.7 in England: an observational cohort study Patone M, Thomas K, Hatch R, Tan PS, Coupland C, Liao W, Mouncey P, Harrison D, Rowan K, Horby P, Watkinson P, Hippisley-Cox J. United Kingdom No Data
6/17/2021 Impact of smoking on COVID-19 outcomes: a HOPE Registry subanalysis Espejo-Paeres et al. Multi-national No Data
6/16/2021 Clinical manifestations and socio-demographic status of COVID-19 patients during the second-wave of pandemic: A Bangladeshi experience. Ali MR, Hasan MA, Rahman MS, Billah M, Karmakar S, Shimu AS, Hossain MF, Maruf MMH, Rahman MS, Saju MSR, Hasan MR, Acharjee UK, Hasan MF. Bangladesh No Data
6/15/2021 Association of Gender With Outcomes in Hospitalized Patients With 2019-nCoV Infection in Wuhan. Front Public Health Han H, Peng X, Zheng F, Deng G, Cheng X, Peng L. China No Data
6/10/2021 SARS-CoV-2 serology in 4000 health care and administrative staff across seven sites in Lombardy, Italy Sandri MT, Azzolini E, Torri V, Carloni S, Pozzi C, Salvatici M, Tedeschi M, Castoldi M, Mantovani A, Rescigno M.  Italy No Data
6/4/2021 Development of An Individualized Risk Prediction Model for COVID-19 Using Electronic Health Record Data. Mamidi TKK, Tran-Nguyen TK, Melvin RL, Worthey EA. USA No Data
6/3/2021 Leveraging a health information exchange for analyses of COVID-19 outcomes including an example application using smoking history and mortality Tortolero GA, Brown MR, Sharma SV, de Oliveira Otto MC, Yamal JM, Aguilar D, Gunther MD, Mofleh DI, Harris RD, John JC, de Vries PS, Ramphul R, Serbo DM, Kiger J, Banerjee D, Bonvino N, Merchant A, Clifford W, Mikhail J, Xu H, Murphy RE, Wei Q, Vahidy FS, Morrison AC, Boerwinkle E. USA No Data
6/1/2021 Association of Social and Behavioral Risk Factors With Mortality Among US Veterans With COVID-19. Kelly JD, Bravata DM, Bent S, Wray CM, Leonard SJ, Boscardin WJ, Myers LJ, Keyhani S. USA No Data
5/28/2021 Smoking is independently associated with an increased risk for COVID-19 mortality: A systematic review and meta-analysis based on adjusted effect estimates Hou H, Li Y, Zhang P, Wu J, Shi L, Xu J, Diao J, Wang Y, Yang H. Multi-national No Data
5/25/2021 Smoking and COVID-19 Infection and Related Mortality: A Prospective Cohort Analysis of UK Biobank Data. Prats-Uribe A, Xie J, Prieto-Alhambra D, Petersen I. United Kingdom No Data
5/23/2021 Parosmia Due to COVID-19 Disease: A 268 Case Series Rashid RA, Alaqeedy AA, Al-Ani RM. India No Data
5/21/2021 Electronic Cigarette Use Is Not Associated with COVID-19 Diagnosis Jose T, Croghan IT, Hays JT, Schroeder DR, Warner DO. USA No Data
5/9/2021 BMI and pneumonia outcomes in critically ill COVID-19 patients: an international multicenter study Chetboun M, Raverdy V, Labreuche J, Simonnet A, Wallet F, Caussy C, Antonelli M, Artigas A, Goma G, Meziani F, Helms J, Mylonakis E, Levy MM, Kalligeros M, Latronico N, Piva S, Cerf C, Neuville M, Klouche K, Larcher R, Tamion F, Occhiali E, Snacken M, Preiser JC, Kontar L, Riviere A, Silva S, Sarton B, Krouchi R, Dubar V, Palaiodimos L, Karamanis D, Perche J, L'her E, Busetto L, Dicker D, Lev S, Duhamel A, Jourdain M, Pattou F Multinational No Data
5/7/2021 Risk factors associated with the need for oxygen therapy in patients with COVID-19 Noh CS, Kim WY, Baek MS. South Korea No Data
4/29/2021 Body Mass Index, Multi-Morbidity, and COVID-19 Risk Factors as Predictors of Severe COVID-19 Outcomes Nanda S, Chacin Suarez AS, Toussaint L, Vincent A, Fischer KM, Hurt R, Schroeder DR, Medina Inojosa JR, O'Horo JC, DeJesus RS, Abu Lebdeh HS, Mundi MS, Iftikhar S, Croghan IT. USA No Data
4/23/2021 Smoking and the risk of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection Lee SC, Son KJ, Kim DW, Han CH, Choi YJ, Kim SW, Park SC. Korea No Data
4/20/2021 Insights from a Pan India Sero-Epidemiological survey (Phenome-India Cohort) for SARS-CoV2 Naushin S, Sardana V, Ujjainiya R, Bhatheja N, Kutum R, Bhaskar AK, Pradhan S, Prakash S, Khan R, Rawat BS, Tallapaka KB, Anumalla M, Chandak GR, Lahiri A, Kar S, Mulay SR, Mugale MN, Srivastava M, Khan S, Srivastava A, Tomar B, Veerapandian M, Venkatachalam G, Vijayakumar SR, Agarwal A, Gupta D, Halami PM, Peddha MS, Sundaram GM, Veeranna RP, Pal A, Agarwal VK, Maurya AK, Singh RK, Raman AK, Anandasadagopan SK, Karuppanan P, Venkatesan S, Sardana HK, Kothari A, Jain R, Thakur A, Parihar DS, Saifi A, Kaur J, Kumar V, Mishra A, Gogeri I, Rayasam G, Singh P, Chakraborty R, Chaturvedi G, Karunakar P, Yadav R, Singhmar S, Singh D, Sarkar S, Bhattacharya P, Acharya S, Singh V, Verma S, Soni D, Seth S, Vashisht S, Thakran S, Fatima F, Singh AP, Sharma A, Sharma B, Subramanian M, Padwad YS, Hallan V, Patial V, Singh D, Tripude NV, Chakrabarti P, Maity SK, Ganguly D, Sarkar J, Ramakrishna S, Kumar BN, Kumar KA, Gandhi SG, Jamwal PS, Chouhan R, Jamwal VL, Kapoor N, Ghosh D, Thakkar G, Subudhi U, Sen P, Chaudhury SR, Kumar R, Gupta P, Tuli A, Sharma D, Ringe RP, D A, Kulkarni M, Shanmugam D, Dharne MS, Dastager SG, Joshi R, Patil AP, Mahajan SN, Khan AH, Wagh V, Yadav RK, Khilari A, Bhadange M, Chaurasiya AH, Kulsange SE, Khairnar K, Paranjape S, Kalita J, Sastry NG, Phukan T, Manna P, Romi W, Bharali P, Ozah D, Sahu RK, Babu EV, Sukumaran R, Nair AR, Valappil PK, Puthiyamadam A, Velayudhanpillai A, Chodankar K, Damare S, Madhavi Y, Aggarwal VV, Dahiya S, Agrawal A, Dash D, Sengupta S. India No Data
4/19/2021 COVID-19 associated mortality and cardiovascular disease outcomes among US women veterans Tsai S, Nguyen H, Ebrahimi R, Barbosa MR, Ramanan B, Heitjan DF, Hastings JL, Modrall JG, Jeon-Slaughter H USA No Data
4/18/2021 Epidemiological and clinical presentations of hospitalized COVID-19 patients in Libya: An initial report from Africa Elhadi M, Momen AA, Alsoufi A, Msherghi A, Zaid A, Ali Senussi Abdulhadi OM, Elhadi A, Omar Elfandi HB, Salam Alshammam AM, Hadreiez AK, Abdulsalam Elbulati MT, Almahdi El Bibas MA, Mohamed Benaser AA, Rajab Zendah MM, Mohammed Makhlouf AA, Abdulhamed MA, BenSuleiman MM, Amer AO, Shaban MAA, Faraj HA. Libya No Data
4/17/2021 Smoking and risk of COVID-19 hospitalization Puebla Neira D, Watts A, Seashore J, Polychronopoulou E, Kuo YF, Sharma G. USA Yes
4/16/2021 The effect of age on the association between diabetes and mortality in adult patients with COVID-19 in Mexico Woolcott OO, Castilla-Bancayán JP. Mexico No Data
3/25/2021 Socioeconomic Inequalities and Ethnicity Are Associated with a Positive COVID-19 Test among Cancer Patients in the UK Biobank Cohort Lee SF, Nikšić M, Rachet B, Sanchez MJ, Luque-Fernandez MA. United Kingdom No Data
3/25/2021 Characteristics and Behaviors Associated with Prevalent SARS-CoV-2 Infection Aung S, Vittinghoff E, Nah G, Peyser ND, Pletcher MJ, Olgin JE, Marcus GM. Multi-national No Data
3/24/2021 Risk factors and frequency of COVID-19 among healthcare workers at a tertiary care centre in India: a case-control study Dev N, Meena RC, Gupta DK, Gupta N, Sankar J. India No Data
3/22/2021 Association between socioeconomic status and self-reported, tested and diagnosed COVID-19 status during the first wave in the Northern Netherlands: a general population-based cohort from 49 474 adults Zhu Y, Duan MJ, Dijk HH, Freriks RD, Dekker LH, Mierau JO; Lifelines Corona Research initiative Netherlands No Data
3/20/2021 Covid-19 and gender: lower rate but same mortality of severe disease in women-an observational study Raimondi F, Novelli L, Ghirardi A, Russo FM, Pellegrini D, Biza R, Trapasso R, Giuliani L, Anelli M, Amoroso M, Allegri C, Imeri G, Sanfilippo C, Comandini S, Hila E, Manesso L, Gandini L, Mandelli P, Monti M, Gori M, Senni M, Lorini FL, Rizzi M, Barbui T, Paris L, Rambaldi A, Cosentini R, Guagliumi G, Cesa S, Colledan M, Sessa M, Masciulli A, Gavazzi A, Buoro S, Remuzzi G, Ruggenenti P, Callegaro A, Gianatti A, Farina C, Bellasi A, Sironi S, Fagiuoli S, Di Marco F; Italy No Data
3/16/2021 Neurological manifestations as the predictors of severity and mortality in hospitalized individuals with COVID-19: a multicenter prospective clinical study Darazam IA, Salehi M, Karimialavijeh E, Lima BS, Garakani A, Vaccaro A, Ramezani M. Iran No Data
3/8/2021 Heterogeneity in COVID-19 patient volume, characteristics and outcomes across US Department of Veterans Affairs facilities: an observational cohort study Bravata DM, Myers LJ, Perkins AJ, et al. USA No Data
3/6/2021 COVID-19 and smoking: More severity and death - An experience from Iran Heydari G, Arfaeinia H. Iran No Data
3/6/2021 Current smoking and SARS-CoV-2 infection: findings from the Italian cross-sectional EPICOVID19 internet-based survey Prinelli F, Bianchi F, Drago G, Ruggieri S, Sojic A, Jesuthasan N, Molinaro S, Bastiani L, Maggi S, Noale M, Galli M, Giacomelli A, Antonelli Incalzi R, Adorni F, Cibella F. Italy No Data
3/4/2021 Development and validation of a predictive model of in-hospital mortality in COVID-19 patients Velasco-Rodríguez D, Alonso-Dominguez JM, Vidal Laso R, Lainez-González D, García-Raso A, Martín-Herrero S, Herrero A, Martínez Alfonzo I, Serrano-López J, Jiménez-Barral E, Nistal S, Pérez Márquez M, Askari E, Castillo Álvarez J, Núñez A, Jiménez Rodríguez Á, Heili-Frades S, Pérez-Calvo C, Górgolas M, Barba R, Llamas-Sillero P. Spain No Data
3/3/2021 Smoking Is Correlated With the Prognosis of Coronavirus Disease 2019 (COVID-19) Patients: An Observational Study Peng F, Lei S, Zhang Q, Zhong Y, Wu S. China No Data
3/1/2021 COVID-19 or not COVID-19? Compared characteristics of patients hospitalized for suspected COVID-19 Rogier T, Eberl I, Moretto F, Sixt T, Catherine FX, Estève C, Abdallahoui M, Behague L, Coussement A, Mathey L, Mahy S, Buisson M, Salmon-Rousseau A, Duong M, Chavanet P, Bernard Q, Nicolas B, Benguella L, Bonnotte B, Blot M, Piroth L. France No Data
3/1/2021 Epidemiology, Clinical Features, and Outcomes of Hospitalized Adults with COVID-19: Early Experience from an Academic Medical Center in Mississippi Lucar J, Wingler MJB, Cretella DA, Ward LM, Sims Gomillia CE, Chamberlain N, Shimose LA, Brock JB, Harvey J, Wilhelm A, Majors LT, Jeter JB, Bueno MX, Albrecht S, Navalkele B, Mena LA, Parham J USA No Data
2/15/2021 Association of smoking history with severe and critical outcome in COVID-19 patients: A systemic review and meta-analysis Zhang H, Ma S, Han T, Qu G, Cheng C, Uy JP, Shaikh MB, Zhou Q, Song EJ, Sun C Multi-national No Data
2/15/2021 COVID-19 mortality in the UK Biobank cohort: revisiting and evaluating risk factors Elliott J, Bodinier B, Whitaker M, Delpierre C, Vermeulen R, Tzoulaki I, Elliott P, Chadeau-Hyam M. United Kingdom No Data
2/13/2021 Clinical features and prognostic factors of patients with COVID-19 in Henan Province, China Zhang Q, Wang Z, Lv Y, Zhao J, Dang Q, Xu D, Zhao D, Liu H, Wang Z, Zhao X, Xu Z, Zhang X China No Data
2/5/2021 Preexisting respiratory diseases and clinical outcomes in COVID-19: a multihospital cohort study on predominantly African American population Lohia P, Sreeram K, Nguyen P, Choudhary A, Khicher S, Yarandi H, Kapur S, Badr MS USA No Data
2/4/2021 Seroprevalence of anti- SARS- CoV-2 IgG among healthcare workers of a large university hospital in Milan, Lombardy, Italy: a cross- sectional study Lombardi A, Mangioni D, Consonni D, Cariani L, Bono P, Cantù AP, Tiso B, Carugno M, Muscatello A, Lunghi G, Pesatori AC, Riboldi L, Ceriotti F, Bandera A, Gori A. Italy No Data
2/4/2021 Relationship between physical activity, healthy lifestyle and COVID-19 disease severity; a cross-sectional study Tavakol Z, Ghannadi S, Tabesh MR, Halabchi F, Noormohammadpour P, Akbarpour S, Alizadeh Z, Nezhad MH, Reyhan SK Iran No Data
2/1/2021 Smoking and risk of negative outcomes among COVID-19 patients: A systematic review and meta-analysis Umnuaypornlert A, Kanchanasurakit S, Lucero-Prisno DEI, Saokaew S. Multi-national No Data
1/27/2021 COVID-19 Disease Course in Former Smokers, Smokers and COPD Patients Alberca RW, Lima JC, de Oliveira EA, Gozzi-Silva SC, Ramos YÁL, Andrade MMS, Beserra DR, Oliveira LM, Branco ACCC, Pietrobon AJ, Pereira NZ, Teixeira FME, Fernandes IG, Duarte AJDS, Benard G, Sato MN Brazil No Data
1/27/2021 Factors associated with COVID-19-related death in people with rheumatic diseases: results from the COVID-19 Global Rheumatology Alliance physician-reported registry Strangfeld A, Schäfer M, Gianfrancesco MA, Lawson-Tovey S, Liew JW, Ljung L, Mateus EF, Richez C, Santos MJ, Schmajuk G, Scirè CA, Sirotich E, Sparks JA, Sufka P, Thomas T, Trupin L, Wallace ZS, Al-Adely S, Bachiller-Corral J, Bhana S, Cacoub P, Carmona L, Costello R, Costello W, Gossec L, Grainger R, Hachulla E, Hasseli R, Hausmann JS, Hyrich KL, Izadi Z, Jacobsohn L, Katz P, Kearsley-Fleet L, Robinson PC, Yazdany J, Machado PM Multi-national No Data
1/25/2021 Association of Smoking and Cumulative Pack-Year Exposure With COVID-19 Outcomes in the Cleveland Clinic COVID-19 Registry Lowe KE, Zein J, Hatipoglu U, Attaway A. USA No Data
1/22/2021 Characteristics and outcomes of patients with COVID-19 in Hainan, South China Zheng Y, Gao Y, Wu B, Huang L, Chen Y, Cai X China No Data
1/21/2021 Relationship of substance dependence and time to RT-PCR negative status in patients with COVID-19 infection Mehra A, Suri V, Sahoo S, Malhotra P, Yaddanapudi LN, Puri GD, Bhalla A, Grover S India No Data
1/16/2021 Smoking prevalence among hospitalized COVID-19 patients and its association with disease severity and mortality: an expanded re-analysis of a recent publication Farsalinos K, Bagos PG, Giannouchos T, Niaura R, Barbouni A, Poulas K Multi-national No Data
1/14/2021 Smoking and risk of negative outcomes among COVID-19 patients: A systematic review and meta-analysis Umnuaypornlert A, Kanchanasurakit S, Lucero-Prisno DEI, Saokaew S Multi-national No Data
1/13/2021 Sex differences in susceptibility, severity, and outcomes of coronavirus disease 2019: Cross-sectional analysis from a diverse US metropolitan area Vahidy FS, Pan AP, Ahnstedt H, Munshi Y, Choi HA, Tiruneh Y, Nasir K, Kash BA, Andrieni JD, McCullough LD USA No Data
1/9/2021 Impact of Tobacco Smoking on the risk of COVID-19.A large scale retrospective cohort study Paleiron N, Mayet A, Marbac V, Perisse A, Barazzutti H, Brocq FX, Janvier F, Bertrand D, Bylicki O. Naval Vessel Data Available
1/8/2021 Prevalence and risk factors for delirium in critically ill patients with COVID-19 (COVID-D): a multicentre cohort study. Pun BT, Badenes R, Heras La Calle G, Orun OM, Chen W, Raman R, Simpson BK, Wilson-Linville S, Hinojal Olmedillo B, Vallejo de la Cueva A, van der Jagt M, Navarro Casado R, Leal Sanz P, Orhun G, Ferrer Gómez C, Núñez Vázquez K, Piñeiro Otero P, Taccone FS, Gallego Curto E, Caricato A, Woien H, Lacave G, O'Neal HR Jr, Peterson SJ, Brummel NE, Girard TD, Ely EW, Pandharipande PP Multi-national No Data
1/7/2021 Cardiovascular risk factors and mortality in hospitalized patients with COVID-19: systematic review and meta-analysis of 45 studies and 18,300 patients Silverio A, Di Maio M, Citro R, Esposito L, Iuliano G, Bellino M, Baldi C, De Luca G, Ciccarelli M, Vecchione C, Galasso G Multi-national No Data
1/6/2021 Clinical immunity and medical cost of COVID-19 patients under grey relational mathematical model Zhao J, Yao Y, Lai S, Zhou X China No Data
1/1/2021 Rates of COVID-19-Related Outcomes in Cancer Compared With Noncancer Patients Sun L, Surya S, Le AN, Desai H, Doucette A, Gabriel P, Ritchie MD, Rader D, Maillard I, Bange E, Huang AC, Vonderheide RH, DeMichele A, Verma A, Mamtani R, Maxwell KN USA No Data
1/1/2021 Incidence, Clinical Characteristics, and Evolution of SARS-CoV-2 Infection in Patients With Inflammatory Bowel Disease: A Single-Center Study in Madrid, Spain Guerra I, Algaba A, Jiménez L, Mar Aller M, Garza D, Bonillo D, Molina Esteban LM, Bermejo F. Spain No Data
12/26/2020 Tobacco, alcohol use and other risk factors for developing symptomatic COVID-19 vs asymptomatic SARS-CoV-2 infection: a case-control study from western Rajasthan, India Saurabh S, Verma MK, Gautam V, Kumar N, Jain V, Goel AD, Gupta MK, Sharma PP, Bhardwaj P, Singh K, Nag VL, Garg MK, Misra S India No Data
12/23/2020 Risks of and risk factors for COVID-19 disease in people with diabetes: a cohort study of the total population of Scotland McGurnaghan SJ, Weir A, Bishop J, Kennedy S, Blackbourn LAK, McAllister DA, Hutchinson S, Caparrotta TM, Mellor J, Jeyam A, O'Reilly JE, Wild SH, Hatam S, Höhn A, Colombo M, Robertson C, Lone N, Murray J, Butterly E, Petrie J, Kennon B, McCrimmon R, Lindsay R, Pearson E, Sattar N, McKnight J, Philip S, Collier A, McMenamin J, Smith-Palmer A, Goldberg D, McKeigue PM, Colhoun HM United Kingdom No Data
12/18/2020 Impact of Cardiovascular Risk Factors and Cardiovascular Diseases on Outcomes in Patients Hospitalized with COVID-19 in Daegu Metropolitan City Park BE, Lee JH, Park HK, Kim HN, Jang SY, Bae MH, Yang DH, Park HS, Cho Y, Lee BY, Nam CW, Lee JB, Kim U, Chae SC Korea No Data
12/17/2020 Underlying heart diseases and acute COVID-19 outcomes Núñez-Gil IJJ, Fernández-Ortiz A, Maroud Eid C, Huang J, Romero R, Becerra-Muñoz VM, Uribarri A, Feltes G, Trabatoni D, Fernandez-Rozas I, Viana-Llamas MC, Pepe M, Cerrato E, Bertaina M, Capel Astrua T, Alfonso E, Castro-Mejía AF, Raposeiras-Roubin S, D'Ascenzo F, Espejo Paeres C, Signes-Costa J, Bardaji A, Fernandez-Pérez C, Marin F, Fabregat-Andres O, Akin I, Estrada V, Macaya C. European Union No Data
12/17/2020 Prevalence and risk factors of disability and anxiety in a retrospective cohort of 432 survivors of Coronavirus Disease-2019 (Covid-19) from China Zhu S, Gao Q, Yang L, Yang Y, Xia W, Cai X, Hui Y, Zhu D, Zhang Y, Zhang G, Wu S, Wang Y, Zhou Z, Liu H, Zhang C, Zhang B, Yang J, Feng M, Ni Z, Chen B, Du C, He H, Qu Y, Wei Q, He C, Reinhardt JD China No Data
12/16/2020 Smoking and comorbidities are associated with COVID-19 severity and mortality in 565 patients treated in Turkey: a retrospective observational study Caliskan T, Saylan B Turkey No Data
12/15/2020 Controversy over Smoking in COVID-19 - A Real World Experience in New York City Ho KS, Narasimhan B, Sheehan J, Wu L, Fung JY USA No Data
12/15/2020 Pregnant women with SARS-CoV-2 infection are at higher risk of death and severe pneumonia: propensity score-matched analysis of a nationwide prospective cohort study (COV19Mx) Martinez-Portilla RJ, Sotiriadis A, Chatzakis C, Torres-Torres J, Espino Y Sosa S, Sandoval-Mandujano K, Castro-Bernabe DA, Medina-Jimenez V, Monarrez-Martin JC, Figueras F, Poon LC. Mexico No Data
12/14/2020 Applicability of MuLBSTA scoring system as diagnostic and prognostic role in early warning of severe COVID-19 Ma B, Gong J, Yang Y, Yao X, Deng X, Chen X. China No Data
12/13/2020 SARS-CoV-2 infections among healthcare workers at Helsinki University Hospital, Finland, spring 2020: Serosurvey, symptoms and risk factors. Kantele A, Lääveri T, Kareinen L, Pakkanen SH, Blomgren K, Mero S, Patjas A, Virtanen J, Uusitalo R, Lappalainen M, Järvinen A, Kurkela S, Jääskeläinen AJ, Vapalahti O, Sironen T. Finland No Data
12/9/2020 Influence of Cigarettes and Alcohol on the Severity and Death of COVID-19: A Multicenter Retrospective Study in Wuhan, China Dai M, Tao L, Chen Z, Tian Z, Guo X, Allen-Gipson DS, Tan R, Li R, Chai L, Ai F, Liu M. China No Data
12/5/2020 Diabetes and Covid-19 among hospitalized patients in Saudi Arabia: a single-centre retrospective study AM Alguwaiheset al. Saudi Arabia No Data
12/4/2020 Clinical risk factors for mortality of hospitalized patients with COVID-19: systematic review and meta-analysis Xiang G, Xie L, Chen Z, Hao S, Fu C, Wu Q, Liu X, Li S Multi-national No Data
12/3/2020 Tobacco smoking confers risk for severe COVID-19 unexplainable by pulmonary imaging J Li et al. China No Data
12/1/2020 Risk factors and predictors associated with the severity of COVID-19 in China: a systematic review, meta-analysis, and meta-regression Zhang T, Huang WS, Guan W, Hong Z, Gao J, Gao G, Wu G, Qin YY. China No Data
12/1/2020 Early epidemiological indicators, outcomes, and interventions of COVID-19 pandemic: A systematic review U Patel et al. Mostly China No Data
11/30/2020 Risk factors of the severity of COVID-19: A meta-analysis Rahman A, Sathi NJ China No Data
11/26/2020 Experience of 101 patients with coronavirus infectious disease 2019 (COVID-19) at a tertiary care center in Japan Yao K, Hasegawa S, Tagashira Y, Takamatsu A, Uenoyama Y, Shimizu K, Honda H; Tokyo Metropolitan Tama Medical Center COVID-19 treatment team. Japan No Data
11/26/2020 Fatality rate and predictors of mortality in an Italian cohort of hospitalized COVID.19 patients M Bellan et al. Italy No Data
11/26/2020 Inflammatory-Related Clinical and Metabolic Outcomes in COVID-19 Patients M Martinez-Urbistondo et al. Spain No Data
11/19/2020 Coronavirus disease 2019 outcomes among patients with rheumatic diseases 6 months into the pandemic N Serling-Boyd et al. USA No Data
11/18/2020 The relation between left ventricular global longitudinal strain and troponin levels in patients hospitalized with COVID-19 pneumonia B Balaban Kocas et al. Turkey No Data
11/16/2020 Clinical characteristics and outcomes of diabetics hospitalized for COVID-19 infection: a single-centered, retrospective, observational study Mansour A, Sajjadi-Jazi SM, Kasaeian A, Khosravi B, Sorouri M, Azizi F, Rajabi Z, Motamedi F, Sirusbakht A, Eslahi M, Mojtabbavi H, Sima AR, Radmard AR, Mohajeri-Tehrani MR, Abdollahi M Iran No Data
11/17/2020 Influence of prior comorbidities and chronic medications use on the risk of COVID-19 in adults: a population- based cohort study in Tarragona, Spain A Vila-Córcoles et al. Spain No Data
11/13/2020 Risk factors for severe and critically ill COVID-19 patients: a review YD Gao et al. Multiple No Data
11/12/2020 Smoking and COVID-19, the paradox to discover: An Italian retrospective, observational study in hospitalized and non-hospitalized patients C Lombardi, E Roca, L Ventura, M Cottini Italy No Data
11/12/2020 Pneumonia in medical professionals during COVID-19 outbreak in cardiovascular hospital I Ilic, M Zdravkovic, S Timcic, DU Stojanovic, M Bojic, G oncar Serbia No Data
11/10/2020 Comparison of the clinical characteristics and outcomes of hospitalized adult COVID-19 and influenza patients – a prospective observational study R Auvinen, H Nohynek, R Syrjänen, J Ollgren, T Kerttula, J Mäntylä, N Ikonen, R Loginov, A Haveri, S Kurkela, K Skogberg Finland No Data
11/8/2020 COVID-19 Susceptibility in Bronchial Asthma I Green, E Merzon, S Vinker, A Golan-Cohen, E Magen Israel No Data
11/5/2020 Is older age associated with COVID-19 mortality in the absence of other risk factors? General population cohort study of 470,034 participants FK Ho et al. United Kingdom No Data
11/4/2020 Clinical characteristics, laboratory abnormalities and CT findings of COVID-19 patients and risk factors of severe disease: a systematic review and meta-analysis Xie J, Wang Q, Xu Y, Zhang T, Chen L, Zuo X, Liu J, Huang L, Zhan P, Lv T, Song Y. Multi-national No Data
11/1/2020 Clinical characteristics of 345 patients with coronavirus disease 2019 in Japan: A multicenter retrospective study M Ishii et al. Japan No Data
11/1/2020 Clinical characteristics and in-hospital mortality of COVID-19 adult patients in Saudi Arabia SI Abohamr et al. Saudi Arabia No Data
10/27/2020 Exploiting an early warning Nomogram for predicting the risk of ICU admission in patients with COVID-19: a multi-center study in China Y Zhou et al. China No Data
10/23/2020 Risk factors associated with morbidity and mortality outcomes of COVID-19 patients on the 28th day of the disease course: a retrospective cohort study in Bangladesh MZ Islam, BK Riaz, ANMS Islam, F Khanam, J Akhter, R Choudhury, N Farhana, NA Jahan, MJ Uddin, SS Efa Bangladesh No Data
10/22/2020 Cardiac injury prediction and lymphocyte immunity and inflammation analysis in hospitalized patients with coronavirus disease 2019 (COVID-19) W Zhou, L Song, X Wang, Z Xu, S Wang, J Wang, H Xu, Y Zheng, Y Wang China No Data
10/20/2020 Comorbidities, Cardiovascular Therapies, and COVID-19 Mortality: A Nationwide, Italian Observational Study (ItaliCO) Polverino F, Stern DA, Ruocco G, Balestro E, Bassetti M, Candelli M, Cirillo B, Contoli M, Corsico A, D'Amico F, D'Elia E, Falco G, Gasparini S, Guerra S, Harari S, Kraft M, Mennella L, Papi A, Parrella R, Pelosi P, Poletti V, Polverino M, Tana C, Terribile R, Woods JC, Di Marco F, Martinez FD; ItaliCO study group. Italy No Data
10/16/2020 Flattening the curve in 52 days: characterisation of the COVID-19 pandemic in the Principality of Liechtenstein – an observational study SL Thiel, MC Weber, L Risch, N Wohlwend, T Lung, D Hillmann, M Ritzler, M Risch, P Kohler, P Vernazza, CR Kahlert, F Fleisch, A Cusini, TV Karajan, S Copeland, M Paprotny Liechtenstein No Data
10/12/2020 Baseline Demographics and Clinical Characteristics Among 3471 US Patients Hospitalized with COVID-19 and Pulmonary Involvement: A Retrospective Study JH Best et al. USA No Data
10/8/2020 Association of cigarette smoking, obesity, and underlying medical conditions with COVID-19 hospitalization and mortality in Iran: A nationwide retrospective ecological study. Khorrami Z, Nili S, Sharifi H, Eybpoosh S, Shokoohi M. Iran No Data
10/8/2020 Risk Factors for Severe Acute Respiratory Syndrome Coronavirus 2 Infection in Homeless Shelters in Chicago, Illinois-March-May, 2020 I Ghinai et al. USA No Data
10/8/2020 The Role of Smoking and Nicotine in the Transmission and Pathogenesis of COVID-19 AE Sifat, S Nozohouri, H Villalba, B Vaidya, TJ Abbruscato No Data
10/8/2020 A Systematic Review and Meta-Analysis of Hospitalised Current Smokers and COVID-19 J González-Rubio et al. Multi-national No Data
10/7/2020 Nations with high smoking rate have low SARS-CoV-2 infection and low COVID-19 mortality rate Landoni G, Zangrillo A, Romero García CS, Faustini C, Di Piazza M, Conte F, Gattarello S, Kuzovlev A, Likhvantsev V, Puglisi R Multinational No Data
10/7/2020 Smoking Doubles the Mortality Risk in COVID-19: A Meta-Analysis of Recent Reports and Potential Mechanisms HM Salah, T Sharma, J Mehta Multiple No Data
10/7/2020 Clinical characteristics and outcome of hospitalized patients with SARS-CoV-2 infection at Toulouse University hospital (France). A Jourdes et al. France No Data
10/7/2020 Hospitalised COVID-19 patients of the Mount Sinai Health System: a retrospective observational study using the electronic medical records Z Wang et al. USA No Data
10/6/2020 Role of Cigarette Smoke on ACE-2 Protein Membrane Expression in Bronchial Epithelial Cells Using an Air-Liquid Interface Model M Caruso et al. No Data
10/2/2020 The association of smoking status with SARS-CoV-2 infection, hospitalisation and mortality from COVID-19: A living rapid evidence review with Bayesian meta-analyses (version 7) D Simons, L Shahab, J Brown, O Perski Multi-national No Data
10/1/2020 Clinical Characteristics and Outcomes Among COVID-19 Hospitalized Patients with Chronic Conditions: A Retrospective Single-Center Study ZS Almalki et al. Saudi Arabia No Data
10/1/2020 Clinical characteristics, symptoms and outcomes of 1054 adults presenting to hospital with suspected COVID-19: A comparison of patients with and without SARS-CoV-2 infection NJ Brendish, S Poole, VV Naidu, CT Mansbridge, N Norton, F Borca, HT Phan, H Wheele, M Harvey, L Presland, TW Clark United Kingdom No Data
10/1/2020 Characteristics Associated With Racial/Ethnic Disparities in COVID-19 Outcomes in an Academic Health Care System T Gu et al. USA No Data
10/1/2020 First results of the “Lean European Open Survey on SARS-CoV-2-Infected Patients (LEOSS)” CEM Jakob et al. European Union No Data
9/30/2020 Derivation and Validation of Clinical Prediction Rules for COVID-19 Mortality in Ontario, Canada DN Fisman et al. Canada No Data
9/28/2020 Anosmia is associated with lower in-hospital mortality in COVID-19 B Talavera et al. USA No Data
9/23/2020 Smoking is associated with worse outcomes of COVID-19 particularly among younger adults: A systematic review and meta-analysis R Patanavanich, SA Glantz No Data
9/23/2020 The Paradox of the Low Prevalence of Current Smokers Among Covid-19 Patients Hospitalized in Non-Intensive Care Wards: Results From an Italian Multicenter Case-Control Study S Meini, A Fortini, R Andreini, LA Sechi, C Tascini Italy No Data
9/21/2020 Clinical features of patients with type 2 diabetes with and without Covid-19: A case control study (CoViDiab I) E Maddaloni et al. Italy No Data
9/19/2020 Clinical Characteristics and Predictors of 28-Day Mortality in 352 Critically Ill Patients with COVID-19: A Retrospective Study A Alharthy et al. Saudi Arabia No Data
9/15/2020 Association of smoking status with outcomes in hospitalised patients with COVID-19 M Adrish et al. USA Yes
9/14/2020 SARS2 simplified scores to estimate risk of hospitalization and death among patients with COVID-19 H Dashti USA No Data
9/9/2020 The Effect of Smoking on COVID-19 Symptom Severity: Systematic Review and Meta-Analysis A Gülsen, BA Yigitbas, B Uslu, D Drömann, O Kilinc Multi-national No Data
9/8/2020 Meta-analysis of Cardiovascular Events and Related Biomarkers Comparing Survivors vs. Non-survivors in Patients with COVID-19 Shoar S, Hosseini F, Naderan M, Mehta JL. Iran No Data
9/4/2020 Presenting characteristics, smoking versus diabetes and outcome among patients hospitalized with COVID-19 Abbas HM, Nassir KF, Al Khames Aga QA, et al. Iraq No Data
9/1/2020 Risk Factors for Hospitalization and Mortality due to COVID-19 in Espírito Santo State, Brazil Soares RCM, Mattos LR, Raposo LM. Brazil No Data
9/1/2020 Clinical Features and Chest Imaging as Predictors of Intensity of Care in Patients with COVID-19 E Cocconcelli Italy No Data
9/1/2020 COVID-19 clinical outcomes and nationality: results from a Nationwide registry in Kuwait Hamadah H, Alahmad B, Behbehani M, et al. Kuwait No Data
9/1/2020 Clinical Features of Coronavirus Disease 2019 Patients With Mechanical Ventilation: A Nationwide Study in China. T Wang China No Data
8/29/2020 Clinical characteristics and factors affecting the duration of positive nucleic acid test for patients of COVID-19 in XinYu, China Jingjing Lu 1, Qi Yin 1, Quan Li 2, Gang Fu 3, Xueping Hu 1, Jianhao Huang 1, Lin Chen 2, Qiang Li 1, Zhongliang Guo China No Data
8/27/2020 Hemoglobin A1C is a Predictor of COVID-19 Severity in Patients with Diabetes Eugene Merzon 1 2, Ilan Green 1, Miriam Shpigelman 3, Shlomo Vinker 1 2, Itamar Raz 4 5, Avivit Golan-Cohen 1 2, Roy Eldor Israel No Data
8/24/2020 Survival rate in hypertensive patients with COVID-19 Amir Emami 1, Fatemeh Javanmardi 1, Ali Akbari 2, Javad Kojuri 3, Hamid Bakhtiari 4, Tahereh Rezaei 5, Abdolkhalegh Keshavarzi 6, Farshad Falahati 5 Iran No Data
8/20/2020 COVID-19 in Cancer Patients From New York City: A Comparative Single Center Retrospective Analysis P Ramachandran et al. USA No Data
8/19/2020 COVID-19-Associated Critical Illness—Report of the First 300 Patients Admitted to Intensive Care Units at a New York City Medical Center S Chand USA No Data
8/14/2020 Obesity and Smoking as Risk Factors for Invasive Mechanical Ventilation in COVID-19: a Retrospective, Observational Cohort Study. AC Costa Monteiro USA No Data
8/13/2020 Clinical characteristics and risk factors for mortality of patients with COVID-19 in a large dataset from Mexico. GM Parra-Bracamonte, N Lopez-Villalobos, FE Parra-Bracamonte Mexico No Data
8/13/2020 Risk factors for COVID-19-related mortality in people with type 1 and type 2 diabetes in England: a population-based cohort study E Barron United Kingdom No Data
8/13/2020 Characteristics and Outcomes of a Sample of Patients With COVID-19 Identified Through Social Media in Wuhan, China: Observational Study D Liu China No Data
8/12/2020 Prevalence of Anosmia and Ageusia in Patients with COVID-19 at a Primary Health Center, Doha, Qatar Raid M. Al-Ani1, Debashis Acharya Qatar No Data
8/11/2020 Development and validation of a model for individualized prediction of hospitalization risk in 4,536 patients with COVID-19 L Jehi USA No Data
8/9/2020 Features of severe COVID-19: a systematic review and meta-analysis. Francesco Del Sole 1, Alessio Farcomeni 2, Lorenzo Loffredo 1, Roberto Carnevale 3 4, Danilo Menichelli 1, Tommasa Vicario 5 6, Pasquale Pignatelli 1 4, Daniele Pastori 1 China No Data
8/4/2020 The effect of smoking on COVID‐19 severity: A systematic review and meta‐analysis RK Reddy, WN Charles, A Sklavounos, A Dutt, PT Seed, A Khajuria Mainly China No Data
8/4/2020 Clinical Characteristics and Severity of COVID-19 Disease in Patients from Boston Area Hospitals HT Dashti, D Bates, JM Fiskio, EC Roche, S Mora, O Demler USA No Data
8/4/2020 Clinical course and severity outcome indicators among COVID 19 hospitalized patients in relation to comorbidities distribution Mexican cohort G Carrillo, N Mendez Dominguez, KD Santos Zaldivar, A Rochel Perez, M Azuela Morales, O Cuevas Koh, A Alvarez Baeza Mexico No Data
8/3/2020 What factors increase the risk of complications in SARS-Cov-2 infected patients? A cohort study in a nationwide Israeli health organization C Yanover, B Mizrahi, N Kalkstein, K Marcus, P Akiva, Y Barer, V Shalev, G Chodick Israel No Data
8/3/2020 Immune complement and coagulation dysfunction in adverse outcomes of SARS-CoV-2 infection V Ramlall, PM Thangaraj, C Meydan C USA No Data
8/1/2020 Effect of chronic obstructive pulmonary disease and smoking on the outcome of COVID-19 Pranata R, Soeroto AY, Huang I, et al. Multi-national No Data
8/1/2020 Quantification of the association between predisposing health conditions, demographic, and behavioural factors with hospitalisation, intensive care unit admission, and death from COVID-19: a systematic review and meta-analysis NV Fernandez Villalobos, JJ Ott, CJ, Klett-Tammen, A Bockey, P Vanella, G Krause, B Lange Worldwide No Data
8/1/2020 Sex-specificity of mortality risk factors among hospitalized COVID-19 patients in New York City: prospective cohort study T Jun, S Nirenberg, P Kovatch, KI Huang USA No Data
7/31/2020 Common cardiovascular risk factors and in-hospital mortality in 3,894 patients with COVID-19: survival analysis and machine learning-based findings from the multicentre Italian CORIST Study Di Castelnuovo A, Bonaccio M, Costanzo S, et al. Italy No Data
7/31/2020 COVID-19 case-fatality rate and demographic and socioeconomic influencers: a worldwide spatial regression analysis based on country-level data Y Cao, A Hiyoshi, S Montgomery Worldwide No Data
7/30/2020 Characteristics and risk factors for COVID-19 diagnosis and adverse outcomes in Mexico: an analysis of 89,756 laboratory-confirmed COVID-19 cases. TV Giannouchos, RA Sussman, JM Mier, K Poulas, K Farsalinos Mexico No Data
7/30/2020 Prediction model and risk scores of ICU admission and mortality in COVID-19 Z Zhao, A Chen, W Hou, JM Graham, H Li, PS Richman, HC Thode, AJ Singer, TQ Duong USA No Data
7/30/2020 Nicotine-replacement therapy, as a surrogate of smoking, and the risk of hospitalization with Covid-19 and all-cause mortality: a nationwide, observational cohort study in France M Zureik, B Baricault, C Vabre, L Semenzato, J Drouin, F Cuenot, L Penso, P Herlemont, E Sbidian, A Weill, M Molimard, R Dray-Spira, J Botton France No Data
7/30/2020 Early Clinical Factors Predicting the Development of Critical Disease in Japanese Patients with COVID-19: A Single-Center Retrospective, Observational Study T Higuchi, T Nishida, H Iwahashi, O Morimura, Y Otani, Y Okauchi, M Yokoe, N Suzuki, M Inada, K Abe Japan No Data
7/30/2020 Multimorbidity patterns among COVID-19 deaths: considerations for a better medical practice JA Fernandez-Nino, JA Guerra-Gomez, AJ Idrovo-Velandia Colombia No Data
7/30/2020 Disparities in Case Frequency and Mortality of Coronavirus Disease 2019 (COVID-19) Among Various States in the United States RS Loomba, G Aggarwal, S Aggarwal, S Flores, EG Villarreal, J Farias, CJ Lavie USA No Data
7/29/2020 Clinical characteristics of COVID-19 and its comparison with influenza pneumonia. J Qu, LK Chang, X Tang, Y Du, X Yang, X Liu, P Han, Y Xue China No Data
7/29/2020 Eleven Routine Clinical Features Predict COVID-19 Severity K Zhou, Y Sun, L Li, Z Zang, J Wang, J Li, J Liang, F Zhang, Q Zhang, W Ge, H Chen, X Sun, L Yue, X Wu, B Shen, J Xu, H Zhu, S Chen, H Yang, S Huang, M Peng, D Lv, C Zhang, H Zhao, L Hong, Z Zhou, H Chen, X Dong, C Tu, M Li, Y Zhu, B Chen, SZ Li, T Guo China No Data
7/29/2020 Descriptive epidemiology of 16,780 hospitalized COVID-19 patients in the United States S Rizzo, D Chawla, K Zalocusky, D Keebler, J Chia, L Lindsay, V Yau, T Kamath, L Tsai USA No Data
7/27/2020 Clozapine treatment and risk of COVID-19 R Govind, D Fonseca de Freitas, M Pritchard, RD Hayes, JH MacCabe United Kingdom No Data
7/27/2020 The Outcome of COVID-19 Patients with Acute Myocardial Infarction H Altamimi, Y Alahmad, F Khazal, M Elhassan, H AlBinali, A Arabi, A AlQahtani, N Asaad, M Al-Hijji, T Hamid, I Rafie, AS Omrani, S AlKaabi, A Alkhal, M AlMalslmani, M Ali, M Alkhani, M AlNesf, S Abu Jalala, S Arafa, R ElSousy, O AlTamimi, E Soaly, C Abi khalil, J Al Suwaidi Qatar No Data
7/27/2020 Predicting Critical State after COVID-19 Diagnosis Using Real-World Data from 20152 Confirmed US Cases MD Rinderknecht, Y Klopfenstein USA No Data
7/26/2020 Underlying respiratory diseases, specifically COPD, and smoking are associated with severe COVID-19 outcomes: A systematic review and meta-analysis DC Sanchez-Ramirez, D Mackey Mostly China No Data
7/26/2020 Characteristics and Outcomes of 599 Patients Infected with COVID-19 in Wuhan, China: Based on an Online Reported Sample D Liu, Y Wang, J Wang, J Liu, Y Yue, W Liu, Z Wang China No Data
7/24/2020 Association between chronic ACE inhibitor exposure and decreased odds of severe disease in patients with COVID-19 N Şenkal, R Meral, A Medetalibeyoğlu, H Konyaoğlu, M Kose, T Tukek Turkey No Data
7/24/2020 Reducing COVID-19 hospitalization risk through behavior change ML Adams, DL Katz, J Grandpre, D Shenson USA No Data
7/23/2020 Clinical characteristics and severity of COVID-19 among Mexican adults Pérez-Sastré MA, Valdés J, Ortiz-Hernández L Mexico No Data
7/23/2020 COVID-19 and associations with frailty and multimorbidity: a prospective analysis of UK Biobank participants SJ Woolford, S D'Angelo, EM Curtis, CM Parsons, KA Ward, EM Dennison, HP Patel, C Cooper, NC Harvey United Kingdom No Data
7/21/2020 Retrospective analysis of clinical characteristics of 405 patients with COVID-19 Ting Zhan 1, Meng Liu 1, Yalin Tang 1 2, Zheng Han 1, Xueting Cheng 3, Junsheng Deng 3, Xiaoli Chen 1, Xia Tian 1, Xiaodong Huang 1 China No Data
7/20/2020 Critically Ill Patients with Coronavirus Disease 2019 in a Designated ICU: Clinical Features and Predictors for Mortality Z-H Wang , C Shu, X Ran, C-H Xie, L Zhang China No Data
7/14/2020 Renin-Angiotensin-Aldosterone System Blockers Are Not Associated With Coronavirus Disease 2019 (COVID-19) Hospitalization: Study of 1,439 UK Biobank Cases Z Raisi-Estabragh, C McCracken, M Ardissino, MS Bethell, J Cooper, C Cooper , NC Harvey, SE Petersen United Kingdom No Data
7/14/2020 Smoking and Angiotensin-converting Enzyme Inhibitor/Angiotensin Receptor Blocker Cessation to Limit Coronavirus Disease 2019 M Rossato, A Di Vincenzo No Data
7/14/2020 Clinical, radiological and laboratory characteristics and risk factors for severity and mortality of 289 hospitalized COVID-19 patients. JJ Zhang, YY Cao, G Tan, X Dong, BC Wang, J Lin, YQ Yan, GH Liu, M Akdis, CA Akdis, YD Gao China No Data
7/13/2020 Risk of severe COVID-19 disease with ACE inhibitors and angiotensin receptor blockers: cohort study including 8.3 million people Hippisley-Cox J, et al. United Kingdom No Data
7/10/2020 Natural killer cell activation related to clinical outcome of COVID-19 C Maucourant, COVID-19 Study Group Sweden No Data
7/7/2020 COVID-19 and associations with frailty and multimorbidity: a prospective analysis of UK Biobank participants SJ Woolford, S D’Angelo, EM Curtis, CM Parsons, KA Ward, EM Dennison, HP Patel, C Cooper, NC Harvey United Kingdom No Data
7/6/2020 IL6 inhibition in critically ill COVID-19 patients is associated with increased secondary infections Lucas M Kimmig, David Wu, Matthew Gold, Natasha N Pettit, David Pitrak, Jeffrey Mueller, Aliya N Husain, Ece A Mutlu, Gokhan M Mutlu USA No Data
7/4/2020 Characteristics, risk factors and outcomes among the first consecutive 1096 patients diagnosed with COVID-19 in Kuwait S Almazeedia, S Al-Youhaa, MH Jamala, M Al-Haddada, A Al-Muhainia, F Al-Ghimlasb, S Al-Sabaha Kuwait No Data
7/4/2020 Age Matters: COVID-19 Prevalence in a Vaping Adolescent Population - An Observational Study N Tandan, MR Regmi, R Maini, AM Ibrahim, C Koester, O Lara Garcia, P Parajuli, M Al-Akchar, A Kulkarni, R Robinson USA Yes
7/1/2020 Meta-analysis: COVID-19 Disease Severity Correlates With Smoking Status E Lansiaux et al. Multi-national No Data
7/1/2020 Association Between Youth Smoking, Electronic Cigarette Use, and Coronavirus Disease 2019 SMathur Gaiha, J Cheng, B Halpern-Felsher USA Yes
7/1/2020 Smoking prevalence and COVID-19 in Europe P Tsigaris, JA Teixeira da Silva 38 European countries Yes
6/30/2020 Associations of clinical characteristics and treatment regimens with the duration of viral RNA shedding in patients with COVID-19 Chen X, Zhu B, Hong W, et al. China No Data
6/30/2020 COVID-19, smoking, vaping and quitting: A representative population survey in England H Tattan-Birch, O Perski, SE Jackson, L Shahab, R West, J Brown United Kingdom Yes
6/29/2020 Smoking, SARS-CoV-2 and COVID-19: A review of reviews considering implications for public health policy and practice. EJ Grundy, T Suddek, FT Filippidis, A Majeed, S Coronini-Cronberg No Data
6/29/2020 Comparison of the clinical characteristics and outcomes of hospitalized adult COVID-19 and influenza patients: a prospective observational study R Auvinen, H Nohynek, R Syrjänen, J Ollgren, T Kerttula, J Mäntylä, N Ikonen, R Loginov, A Haveri, S Kurkela, K Skogberg Finland No Data
6/26/2020 Factors Associated with Hospitalization and Disease Severity in a Racially and Ethnically Diverse Population of COVID-19 Patients A Mendy, S Apewokin, AA Wells, AL Morrow USA No Data
6/26/2020 Clinical course and potential predicting factors of pneumonia of adult patients with coronavirus disease 2019 (COVID-19): A retrospective observational analysis of 193 confirmed cases in Thailand WA Pongpirul, S Wiboonchutikul, L Charoenpong, N Panitantum, A Vachiraphan, S Uttayamakul, K Pongpirul, W Manosuthi, W Prasithsirikul Thailand No Data
6/25/2020 Current smoking, former smoking, and adverse outcome among hospitalized COVID-19 patients: a systematic review and meta-analysis. K Farsalinos, A Barbouni, K Poulas, R Polosa, P Caponnetto, R Niaura Multi-national No Data
6/22/2020 Unequal Impact of Structural Health Determinants and Comorbidity on COVID-19 Severity and Lethality in Older Mexican Adults: Considerations Beyond Chronological Aging Bello-Chavolla OY, González-Díaz A, Antonio-Villa NE, Fermín-Martínez CA, Márquez-Salinas A, Vargas-Vázquez A, Bahena-López JP, García-Peña C, Aguilar-Salinas CA, Gutiérrez-Robledo LM. Mexico No Data
6/22/2020 Are men who smoke at higher risk for a more severe case of COVID-19 than women who smoke? A Systematic Review A Rodgers, EK Indreberg, L Alfallaj, M Nadkarni, Z Kabir China No Data
6/22/2020 Clinical characteristics and outcomes of critically ill patients with COVID-19 in a tertiary community hospital in upstate New York J Lenka, MS Chhabria, N Sharma, BEx Tan, L Boppana, S Venugopal, DS Sondhi USA No Data
6/22/2020 Epidemiological and clinical characteristics in patients with SARS-CoV-2 antibody negative probable COVID-19 in Wuhan L Duan, S Zhang, M Guo, E Zhou, J Fan, X Wang, L Wang, F Wu, Y Jin China No Data
6/20/2020 How nicotine can inhibit cytokine storm in the lungs and prevent or lessen the severity of COVID-19 infection? M Kloc, RM Ghobrial, JZ Kubiak No Data
6/20/2020 Impact of smoking status on disease severity and mortality of hospitalized patients with COVID-19 infection: a systematic review and meta-analysis A Karanasos, K Aznaouridis, G Latsios, A Synetos, S Plitaria, D Tousoulis, K Toutouzas Multi-national No Data
6/20/2020 Modeling COVID19 mortality in the US: Community context and mobility matter SF McGough, RW Gan, R Tibshirani, AM Meyer USA No Data
6/20/2020 PROGNOSTIC FACTORS IN SPANISH COVID-19 PATIENTS: A CASE SERIES FROM BARCELONA A Siso-Almirall, B Kostov, M Mas-Heredia, S Vilanova-Rotllan, E Sequeira-Aymar, M Sans-Corrales, E Sant-Arderiu, L Cayuelas-Redondo, A Martinez-Perez, N Garcia Plana, A Anguita-Guimet, J Benavent-Areu Spain No Data
6/20/2020 The influence of comorbidity on the severity of COVID-19 disease: systematic review and analysis N Zaki, EA Mohamed, S Ibrahim, G Khan China No Data
6/19/2020 Epidemiological Risk Factors Associated with Death and Severe Disease in Patients Suffering From COVID-19: A Comprehensive Systematic Review and Meta-analysis K Dorjee, H Kim Multi-national No Data
6/18/2020 Limited Role for Antibiotics in COVID-19: Scarce Evidence of Bacterial Coinfection W Wei, JK Ortwine, NS Mang, C Joseph, BC Hall, BC Prokesch USA No Data
6/18/2020 COVID-19 outcomes, risk factors and associations by race: a comprehensive analysis using electronic health records data in Michigan Medicine T Gu, JA Mack, M Salvatore, SP Sankar, TS Valley, K Singh, BK Nallamothu, S Kheterpal, L Lisabeth, LG Fritsche, BG Mukherjee USA No Data
6/17/2020 Prothrombotic antiphospholipid antibodies in COVID-19 Y Zuo USA No Data
6/17/2020 Characteristics Associated with Hospitalization Among Patients with COVID-19 - Metropolitan Atlanta, Georgia, March-April 2020 ME Killerby, R Link-Gelles, SC Haight, CA Schrodt, L England, DJ Gomes, M Shamout, K Pettrone, K O'Laughlin, A Kimball, EF Blau, E Burnett, CN Ladva, CM Szablewski, M Tobin-D'Angelo, N Oosmanally, C Drenzek, DJ Murphy, JM Blum, J Hollberg, B Lefkove, FW Brown, T Shimabukuro, CM Midgley, JE Tate; CDC COVID-19 Response Clinical Team USA No Data
6/16/2020 Risk factors for death in 1859 subjects with COVID-19. L Chen, J Yu, W He, L Chen, G Yuan, F Dong, W Chen, Y Cao, J Yang, L Cai, D Wu, Q Ran, L Li, Q Liu, W Ren, F Gao, H Wang, Z Chen, RP Gale, Q Li, Y Hu China No Data
6/16/2020 Covid-19 in Chile. The experience of a Regional reference Center. Preliminary report F Olivares, D Munoz, A Fica, I Delama, I Alvarez, M Navarrete, M Blackburn, P Garrido, J Granjean Chile No Data
6/16/2020 An International Review of Tobacco Use and the COVID-19 Pandemic: Examining Hospitalization, Asymptomatic Cases, and Severity L Balabanski Multi-national No Data
6/14/2020 National Smoking Rates Correlate Inversely with COVID-19 Mortality MJ Norden, DH Avery, JG Norden, DR Haynor Multi-national No Data
6/12/2020 COVID-19 in patients with thoracic malignancies (TERAVOLT): first results of an international, registry-based, cohort study MC Garassino Multi-national No Data
6/12/2020 Comorbidity and Sociodemographic determinants in COVID-19 Mortality in an US Urban Healthcare System AL Wang, X Zhong, Y Hurd USA No Data
6/12/2020 Ethnicity and outcomes in patients hospitalised with COVID-19 infection in East London: an observational cohort study VJ Apea, YI Wan, R Dhairyawan, ZA Puthucheary, RM Pearse, CM Orkin, JR Prowle United Kingdom No Data
6/12/2020 Multimorbidity, Polypharmacy, and COVID-19 infection within the UK Biobank cohort. R McQueenie, H Foster, B Jani, BD Katikireddi, SV Sattar, N Pell, FK Ho, CL Niedzwiedz, CE Hastie, J Anderson, PB Mark, M Sullivan, CA ODonnell, FS Mair, BI Nicholl United Kingdom No Data
6/11/2020 Cytokine Release Syndrome (CRS) and Nicotine in COVID-19 Patients: Trying to Calm the Storm J Gonzalez-Rubio, C Navarro-Lopez, E Lopez-Najera, A Lopez-Najera, L Jimenez-Diaz, JD Navarro-Lopez, A Najera No Data
6/11/2020 COVID-19 and associations with frailty and multimorbidity: a prospective analysis of UK Biobank participants SJ Woolford, S D'angelo, EM Curtis, CM Parsons, KA Ward, EM Dennison, HP Patel, C Cooper, NC Harvey United Kingdom No Data
6/10/2020 SARS-CoV-2 COVID-19 susceptibility and lung inflammatory storm by smoking and vaping. G Kaur, G Lungarella, I Rahman Vaping and Smoking Data
6/9/2020 Cognitive impairment is a common comorbidity in COVID-19 deceased patients. A hospital-based retrospective cohort study P Martin-Jimenez Spain No Data
6/8/2020 Meta-analysis Investigating the Relationship Between Clinical Features, Outcomes, and Severity of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Pneumonia J Li, X He, ZW Yuanyuan, X Li, Y Zhang, S Li, C Guan, Z Gao, G Dong China No Data
6/8/2020 Risk factors for disease progression in mild to moderate COVID-19 patients- a multi-center observational study. Y Cen, X Chen, Y Shen, XH Zhang, Y Lei, C Xu, WR Jiang, HT Xu, Y Chen, J Zhu, LL Zhang, YH Liu China No Data
6/5/2020 Obesity is the comorbidity more strongly associated for Covid-19 in Mexico. A case-control study E Hernández-Garduño Mexico No Data
6/5/2020 A nicotinic hypothesis for Covid-19 with preventive and therapeutic implications. JP Changeux, Z Amoura, FA Rey, M Miyara No Data
6/5/2020 Characteristics and Outcomes of Hospitalized Young Adults with Mild to Moderate Covid-19 at a University Hospital in India AK Sharma, A Ahmed, VN Baig, P Dhakad, G Dalela, S Kacker, VR Panwar, RB Panwar, R Gupta India No Data
6/5/2020 Review of published systematic reviews and meta-analyses on COVID-19 E Ibrahim, NE Ibrahim No Data
6/3/2020 Sex differences in the frequency of gastrointestinal symptoms and olfactory or taste disorders in 1942 nonhospitalized patients with coronavirus disease 2019 (COVID-19). R Sierpiński Poland No Data
6/3/2020 Risk factors associated with mortality in hospitalized patients with SARS-CoV-2 infection. A prospective, longitudinal, unicenter study in Reus, Spain S Iftimie, AF Lopez-Azcona, M Vicente-Miralles, R Descarrega-Reina, A Hernandez-Aguilera, F Riu, JM Simo, P Garrido, J Joven, J Camps, A Castro Spain No Data
6/2/2020 Risk factors for mortality in pregnant women with SARS-CoV-2 infection RJ Martinez-Portilla, A Sotiriadis, J Torres-Torres, C Christos, A Hawkins-Villarreal, JR Villafan-Bernal, RA Gurrola-Ochoa, F Figueras Mexico No Data
6/2/2020 Greater risk of severe COVID-19 in non-White ethnicities is not explained by cardiometabolic, socioeconomic, or behavioural factors, or by 25(OH)-vitamin D status: study of 1,326 cases from the UK Biobank Z Raisi-Estabragh, C McCracken, MS Bethell, J Cooper, C Cooper, MJ Caulfield, PB Munroe, NC Harvey, SE Petersen United Kingdom No Data
6/2/2020 Age differences in clinical features and outcomes in patients with COVID-19, Jiangsu, China: a retrospective, multi-center cohort study H Luo, S Liu, Y Wang, PA Phillips-Howard, Y Yang, S Ju, D Wang China No Data
6/1/2020 Psychosocial factors and hospitalisations for COVID-19: Prospective cohort study of the general population George David Batty, Ian Deary, Michelle Luciano, Drew Altschul, Mika Kivimaki, Catharine Gale United Kingdom No Data
6/1/2020 Ethnic Disparities in Hospitalisation for COVID-19 in England: The Role of Socioeconomic Factors, Mental Health, and Inflammatory and Pro-inflammatory Factors in a Community-based Cohort Study C Lassale, B Gaye, M Hamer, CR Gale, G David Batty United Kingdom No Data
6/1/2020 Smoking and the risk of COVID-19 in a large observational population study A Israel, I Feldhamer, A Lahad, D Levin-Zamir, G Lavie Israel No Data
5/30/2020 AN INFLAMMATORY CYTOKINE SIGNATURE HELPS PREDICT COVID-19 SEVERITY AND DEATH Diane Marie Del Valle, Seunghee Kim-schulze, Huang Hsin-hui, Noam D Beckmann, Sharon Nirenberg, Bo Wang, Yonit Lavin, Talia Swartz, Deepu Madduri, Aryeh Stock, Thomas Marron, Hui Xie, Manish Kumar Patel, Oliver van Oekelen, Adeeb Rahman, Patricia Kovatch, Judith Aberg, Eric Schadt, Sundar Jagannath, Madhu Mazumdar, Alexander Charney, Adolfo Firpo-Betancourt, Damodara Rao Mendu, Jeffrey Jhang, David Reich, Keith Sigel, Carlos Cordon-Cardo, Marc Feldmann, Samir Parekh, Miriam Merad, Sacha Gnjatic USA No Data
5/29/2020 Non-communicable diseases and inequalities increase risk of death among COVID-19 patients in Mexico JP Gutierrez, SM Bertozzi Mexico No Data
5/28/2020 Nicotine and smoking in the COVID-19 era A Tajlil, S Ghaffari, L Pourafkari, S Mashayekhi, N Roshanravam Mostly China No Data
5/28/2020 Does active smoking worsen Covid-19? A Carmona-Bayonas, P Jimenez-Fonseca, Á Sánchez Arraez, F Álvarez Manceñido, E Castañón China No Data
5/26/2020 Clinical characteristics of patients hospitalized with COVID-19 in Spain: results from the SEMI-COVID-19 Network. JM Casas Rojo, JM Anton Santos, J Millan Nunez-Cortes, C Lumbreras Bermejo, JM Ramos Rincon, E Roy-Vallejo, A Artero Mora, F Arnalich Fernandez, JM Garcia Brunen, JA Vargas Nunez, SJ Freire Castro, L Manzano, I Perales Fraile, A Crestelo Vieitez, F Puchades, E Rodilla, MN Solis Marquinez, D Bonet Tur, MdP Fidalgo Moreno, EM Fonseca Aizpuru, FJ Carrasco Sanchez, E Rabadan Pejenaute, M Rubio-Rivas, JD Torres Pena, R Gomez Huelgas Spain No Data
5/26/2020 Risk of infection and hospitalization by Covid-19 in Mexico: a case-control study J Berumen, M Schmulson, J Alegre, G Guerrero, G Olaiz, RM Wong-Chew, J Larriva-Sahd, C Cantu-Brito, A Ochoa-Guzman, A Garcilazo-Avila, C Gonzalez-Carballo, E Chiquete Mexico No Data
5/25/2020 Hydroxychloroquine and T ocilizumab T herapy in COVID-19 Patients - An Observational Study. Ip A, Berry DA, Hansen E, et al. USA No Data
5/25/2020 Tobacco smoking and COVID-19 infection RN Van Zyl-Smit, G Richards, FT Leone No Data
5/25/2020 Risk factors affecting COVID-19 case fatality rate: A quantitative analysis of top 50 affected countries HP Goh, WI Mahari, NI Ahad, L Chaw, N Kifli, BH Goh, SF Yeoh, LC Ming Multiple No Data
5/25/2020 COVID-19 Outcomes in 4712 consecutively confirmed SARS-CoV2 cases in the city of Madrid. S Heili-Frades Spain No Data
5/23/2020 Morbid Obesity as an Independent Risk Factor for COVID-19 Mortality in Hospitalized Patients Younger Than 50 E Klang, G Kassim, S Soffer, R Freeman, MA Levin, DL Reich USA No Data
5/23/2020 Risk Factors for COVID-19 versus non-COVID-19 related in-hospital and community deaths by Local Authority District in Great Britain SP Leighton, DJ Leighton, J Herron, R Upthegrove, J Cavanagh, G Gkoutos, B Cullen, PK Mallikarjun United Kingdom No Data
5/22/2020 Descriptive characteristics of hospitalized adult smokers and never-smokers with COVID-19 Mohammad Ebrahimi Kalan1, Hassan Ghobadi2, Ziyad Ben Taleb3, Kenneth D. Ward4, Davoud Adham5, Somaieh Matin2, Mehdi Fazlzadeh6,7, Sajjad Narimani8 Iran No Data
5/22/2020 Interim Analysis of Risk Factors for Severe Outcomes among a Cohort of Hospitalized Adults Identified through the U.S. Coronavirus Disease 2019 (COVID-19)-Associated Hospitalization Surveillance Network (COVID-NET) L Kim USA No Data
5/22/2020 Comorbidities, clinical signs and symptoms, laboratory findings, imaging features, treatment strategies, and outcomes in adult and pediatric patients with COVID-19: A systematic review and meta-analysis CR Jutzeler, L Bourguignon, CV Weis, B Tong, C Wong, B Rieck, H Pargger, S Tschudin-Sutter, A Egli, K Borgwardt, M Walter Mostly China No Data
5/21/2020 Current tobacco smoking and risk from COVID-19: results from a population symptom app in over 2.4 million people NS Hopkinson, N Rossi, J El-Sayed Moustafa, AA Laverty, JK Quint, MB Freydin, A Visconti, B Murray, M Modat, S Ourselin, K Small, R Davies, J Wolf, T Spector, CJ Steves, M Falchi United Kingdom No Data
5/21/2020 COVID-19: the key role of pulmonary capillary leakage. An observational cohort study MA Wu, T Fossali, L Pandolfi, L Carsana, D Ottolina, V Frangipane, R Rech, A Tosoni, A Agarossi, C Cogliati, F Meloni, B Marchini, M Nebuloni, E Catena, R Colombo Italy No Data
5/20/2020 Clinical characteristics of 101 COVID-19 nonsurvivors in Wuhan, China: a retrospective study Qiao Shi, Kailiang Zhao, Jia Yu, Fang Jiang, Jiarui Feng, Kaiping Zhao, Xiaoyi Zhang, Xiaoyan Chen, Peng Hu, Yupu Hong, Man Li, Fang Liu, Chen Chen, Weixing Wang China No Data
5/20/2020 COVID-19 in London, a Case Series Demonstrating Late Improvement in Survivors Ahmed Al-Hindawi, Jagdish Sokhi, Joshua Cuddihy, Christopher Lockie, Linsey Christie, Roger Davies, Suveer Singh, Marcela Vizcaychipi, Michelle Hayes, Alice Sisson, Richard Keays United Kingdom No Data
5/20/2020 Dynamic liver function indexes monitoring and clinical characteristics in three types of COVID-19 patients. Chen C, Jiang J, Xu X, Hu Y, Hu Y, Zhao Y. China No Data
5/20/2020 C-Reactive protein and SOFA score as early predictors of critical care requirement in patients with COVID-19 pneumonia in Spain. Vaquero LM, Barrado MES, Escobar D, et al. Spain No Data
5/19/2020 Characteristics and outcome of SARS-CoV-2 infection in cancer patients. Clemence Basse, Sarah Diakite, Vincent Servois, Maxime Frelaut, Aurelien Noret, Audrey Bellesoeur, Pauline Moreau, Marie-Ange Massiani, Anne-Sophie Bouyer, perrine vuagnat, SAndra Malak, Francois-Clement Bidard, Dominique Vanjak, Irene Kriegel, Alexis Burnod, Geoffroy Bilger, Toulsie Ramtohul, Gille Dhonneur, Carole Bouleuc, Nathalie Cassoux, Xavier Paoletti, Laurence Bozec, Paul Cottu France No Data
5/19/2020 Risk factors for hospital admission related to COVID-19 in inflammatory rheumatic diseases Dalifer Freites, Leticia Leon, Arkaitz Mucientes, Luis Rodriguez-Rodriguez, Judit Font, Alfredo Madrid, Jose Ignacio Colomer, Juan Angel Jover, Benjamin Fernandez-Gutierrez, Lydia Abasolo Spain No Data
5/19/2020 Silent Disease and Loss of Taste and Smell are Common Manifestations of SARS-COV-2 Infection in a Quarantine Facility: First report from Saudi Arabia Alanoud A Alshami, Rabab A Alattas, Hadeel F Anan, Hadi S Al Qahtani, Mobarak A Al Mulhim, Abdulbari A Alahilmi, Ahmed H Alfaraj Saudi Arabia No Data
5/19/2020 Clinical characteristics and early outcomes in patients with COVID-19 treated with tocilizumab at a United States academic center. Rimland CA, Morgan CE, Bell GJ, et al. USA No Data
5/19/2020 A one-year hospital-based prospective COVID-19 open-cohort in the Eastern Mediterranean region: T he Khorshid COVID Cohort (KCC) study. Sami R, Soltaninejad F, Amra B, et al. Iran No Data
5/19/2020 COVID-19: Counter-Intuitive Data on Smoking Prevalence and Therapeutic Implications for Nicotine R Polosa, G Caci No Data
5/18/2020 SARS-CoV-2 seroprevalence trends in healthy blood donors during the COVID-19 Milan outbreak. Valenti L, Bergna A, Pelusi S, et al. Italy No Data
5/18/2020 Is sleep apnoea a risk factor for Covid- 19? Findings from a retrospective cohort study. Feuth T , Saaresranta T , Karlsson A, et al. Finland No Data
5/18/2020 Cardiac Structural and Functional Characteristics in Patients with Coronavirus Disease 2019: A Serial Echocardiographic Study. Ge H, Zhu M, Du J, et al. China No Data
5/18/2020 Early Experience with COVD-19 Patients at Academic Hospital in Southwestern United States R Shekhar, S Upadhyay, A Sheikh, J Atencio, D Kapuria USA No Data
5/17/2020 Evaluating the determinants of COVID-19 mortality: A cross-country study J Squalli No Data
5/16/2020 DERIVATION OF A SCORE TO PREDICT ADMISSION TO INTENSIVE CARE UNIT IN PATIENTS WITH COVID-19: THE ABC-GOALS SCORE Mejia-Vilet JM, Cordova-Sanchez BM, Fernandez-Camargo D, Mendez-Perez RA, Morales-Buenrostro LE, Hernandez-Gilsoul T. Mexico No Data
5/16/2020 Derivation and validation of a prognostic model for predicting in-hospital mortality in patients admitted with COVID-19 in Wuhan China the PLANS (Platelet Lymphocyte Age Neutrophil Sex) model. Li J, Chen Y, Chen S, et al. China No Data
5/16/2020 Progression, recovery and fatality in patients with SARS-CoV-2 related pneumonia in Wuhan, China: a single-centered, retrospective, observational study H Wang, Y Lu, Q Lv, X Wu, T Hu, K Wang, Y Liu, Y Hu, L Yu, H Fei, Z Ba, X Lin China No Data
5/15/2020 Two important controversial risk factors in SARS-CoV-2 infection: Obesity and smoking AB Engin, ED Engin, A Engin No Data
5/15/2020 Severe obesity is associated with higher in-hospital mortality in a cohort of patients with COVID-19 in the Bronx, New York L Palaiodimos, DG Kokkinidis, W Li, D Karamanis, J Ognibene, S Arora, WN Southern, CS Mantzoros USA No Data
5/15/2020 Risk factors for SARS-CoV-2 among patients in the Oxford Royal College of General Practitioners Research and Surveillance Centre primary care network: a cross-sectional study. S de Lusignan, J Dorward, A Correa, N Jones, O Akinyemi, G Amirthalingam, N Andrews, R Byford, G Dabrera, A Elliot, J Ellis, F Ferreira, J Lopez Bernal, C Okusi, M Ramsay, J Sherlock, G Smith, J Williams, G Howsam, M Zambon, M Joy, FDR Hobbs United Kingdom No Data
5/15/2020 Clinical Characteristics, Risk Factors and Outcomes Among the First Consecutive 1,096 Patients Diagnosed with COVID-19: The Kuwait Experience S Almazeedi, S Al Youha, MH Jamal, M Al-Haddad, A Al-Muhaini, F Al-Ghimlas, S Al-Sabah Kuwait No Data
5/15/2020 Non-white ethnicity, male sex, and higher body mass index, but not medications acting on the reninangiotensin system are associated with coronavirus disease 2019 (Covid-19) hospitalisation: Review of the first 669 cases from the UK Biobank Z Raisi-Estabragh, C McCracken, M Ardissino, MS Bethell, J Cooper, C Cooper, NC Harvey, SE Petersen United Kingdom No Data
5/14/2020 Early estimation of the risk factors for hospitalisation and mortality by COVID-19 in Mexico MF Carrillo-Vega, G Salinas-Escudero, C Garcia-Pena, LM Gutierrez-Robledo, L Parra-Rodriguez Mexico No Data
5/14/2020 Epidemiology, risk factors and clinical course of SARS-CoV-2 infected patients in a Swiss university hospital: an observational retrospective study J Regina, M Papadimitriou-Olivgeris, R Burger, P Filippidis, J Tschopp, F Desgranges, B Viala, E Kampouri, L Rochat, D Haefliger, M Belkoniene, C Fidalgo, A Kritikos, K Jaton, L Senn, AP Bart, LJ Pagani, O Manuel, L Lhopitallier Switzerland No Data
5/13/2020 Patients with diabetes are at higher risk for severe illness from COVID-19. T argher G, Mantovani A, Wang X-B, et al. China No Data
5/13/2020 What factors increase the risk of complications in SARS-CoV-2 positive patients ? A cohort study in a nationwide Israeli health organization. 2020. Yanover AC, Mizrahi B, Kalkstein N, Marcus K, Akiva P, Barer Y. Isreal No Data
5/13/2020 Lifestyle Risk Factors for Cardiovascular Disease in Relation to COVID-19 Hospitalization: A Community-Based Cohort Study of 387,109 Adults in UK M Hamer, M Kivimaki, CR Gale, GD Batty United Kingdom No Data
5/11/2020 Characteristics associated with hospitalisation for COVID-19 in people with rheumatic disease: data from the COVID-19 Global Rheumatology Alliance physician-reported registry M Gianfrancesco, KL Hyrich, S Al-Adely, L Carmona, MI Danila, L Gossec, Z Izadi, L Jacobsohn, P Katz, S Lawson-Tovey, EF Mateus, S Rush, G Schmajuk, J Simard, A Strangfeld, L Trupin, KD Wysham, S Bhana, W Costello, R Grainger, JS Hausmann, JW Liew, E Sirotich, Pl Sufka, ZS Wallace, J Yazdany, PM Machado, PC Robinson, On behalf of the COVID-19 Global Rheumatology Alliance Multi-national No Data
5/11/2020 Tobacco Smoking and COVID-19 Pandemic: Old and New Issues. A Summary of the Evidence From the Scientific Literature MS Cattaruzza, V Zagà, S Gallus, P D'Argenio, G Gorini No Data
5/11/2020 Health and Demographic Impact on COVID-19 Infection and Mortality in US Counties Z Xie, D Li USA No Data
5/11/2020 Smoking and the risk of COVID-19 infection in the UK Biobank Prospective Study ER Cho, AS Slutsky, P Jha United Kingdom No Data
5/11/2020 Characteristics of SARS-CoV-2 positive and complicated COVID-19 patient cohorts in Israel: A comparative analysis C Yanover, B Mizrahi, N Kalkstein, K Marcus, P Akiva, Y Barer, V Shalev, G Chodick Israel No Data
5/10/2020 Smoking Prevalence is Low in Symptomatic Patients Admitted for COVID-19 N Gaibazzi, D Tuttolomondo, A Guidorossi, A Botti, A Tedeschi, C Martini, M Mattioli Italy No Data
5/9/2020 Are Vapers More Susceptible to COVID-19 Infection? D Li, DP Croft, DJ Ossip, Z Xie USA Yes
5/8/2020 Kidney Allograft Recipients Diagnosed with Coronavirus Disease-2019 : A Single Center Report. medRxiv 2020 Lubetzky M, Aull M, Craig-Shapiro R, et al. USA No Data
5/8/2020 Active smoking and severity of coronavirus disease 2019 (COVID-19): The use of significance testing leads to an erroneous conclusion. E Lo, B Lasnier No Data
5/8/2020 Correlation between prevalence of tobacco smoking and risk and severity of COVID-19 at the national level in the European Union: an ecological study. A Gonzalez-Marron, JM Martinez-Sanchez European Union No Data
5/8/2020 Ethnicity, comorbidity, socioeconomic status, and their associations with COVID-19 infection in England: a cohort analysis of UK Biobank data A Prats-Uribe, R Paredes, D Prieto-Alhambra United Kingdom No Data
5/8/2020 Beyond Smoking Cessation: Investigating Medicinal Nicotine to Prevent and Treat COVID-19 HA Tindle, PA Newhouse, MS Freiberg No Data
5/6/2020 OpenSAFELY: factors associated with COVID-19-related hospital death in the linked electronic health records of 17 million adult NHS patients. E Williamson United Kingdom No Data
5/6/2020 Active Smoking Is Associated With Severity of Coronavirus Disease 2019 (COVID-19): An Update of a Meta-Analysis FR Guo China No Data
5/6/2020 Clinical characteristics and fecal-oral transmission potential of patients with COVID-19 S Wang, J Tu, Y Sheng China No Data
5/6/2020 30-day mortality in patients hospitalized with COVID-19 during the first wave of the Italian epidemic: a prospective cohort study A Giacomelli, AL Ridolfo, L Milazzo, L Oreni, D Bernacchia, M Siano, C Bonazzetti, M Schiuma, A Covizzi, M Passerini, M Piscaglia, M Coen, G Gubertini, G Rizzardini, C Cogliati, AM Brambilla, R Colombo, A Castelli, R Rech, A Riva, A Torre, L Meroni, S Rusconi, S Antinori, M Galli Italy No Data
5/5/2020 COVID-19, smoking, and inequalities: a cross-sectional survey of adults in the UK SE Jackson, J Brown, L Shahab, A Steptoe, D Fancourt United Kingdom No Data
5/5/2020 Clinical and Genetic Characteristics of Covid-19 Patients from UK Biobank DA Kolin, S Kulm, O Elemento United Kingdom No Data
5/5/2020 Risk Factors of the Severity of COVID-19: A Meta-Analysis A Rahman, NJ Sathi China No Data
5/5/2020 Pre-Existing Characteristics Associated with Covid-19 Illness Severity JE Ebinger, N Achamallah, Ji Achamallah, H Achamallah, BL Claggett, N Sun, P Botting, TT Nguyen, E Luong, EH Kim, E Park, Y Liu, R Rosenberry, Y Matusov, S Zhao, I Pedraza, T Zaman, M Thompson, K Raedschelders, AH Berg, JD Grein, PW Noble, SS Chugh, CN Bairey Merz, E Marban, JE Van Eyk, SD Solomon, CM Albert, P Chen, S Cheng USA No Data
5/4/2020 Analysis of hospitalized COVID-19 patients in the Mount Sinai Health System using electronic medical records (EMR) reveals important prognostic factors for improved clinical outcomes Z Wang, AB Zheutlin, YH Kao, KL Ayers, SJ Gross, P Kovatch, S Nirenberg, AW Charney, GN Nadkarni, PF O'Reilly, AC Just, CR Horowitz, G Martin, AD Branch, BS Glicksberg, DS Charney, DL Reich, WK Oh, EE Schadt, R Chen, Li Chen L Chen USA No Data
5/4/2020 A national prospective cohort study of SARS/COV2 pandemic outcomes in the U.S.: The CHASING COVID Cohort M Robertson, S Kulkarni, A Berry, C Mirzayi, AR Maroko, R Zimba, D Westmoreland, C Grov, A Parcesepe, L Waldron, D Nash USA No Data
5/4/2020 A cohort of patients with COVID-19 in a major teaching hospital in Europe AM Borobia, AJ Carcas, F Arnalich, R Alvarez-Sala, J Montserrat, M Quintana, JC Figueira, RM Torres Santos-Olmo, J Garcia-Rodriguez, A Martin-Vega, E Ramirez, A Buno, G Martinez-Ales, N Garcia-Arenzana, M Marti de Gracia, F Moreno, F Reinoso-Barbero, A Martin-Quiros, A Rivera, J Mingorance, CC Carpio, D Prieto Arribas, E Rey Cuevas, M Prados, C Prados, JJ Rios, M Hernan, J Frias, J Arribas, R Arribas Spain No Data
5/2/2020 Modifiable and non-modifiable risk factors for COVID-19: results from UK Biobank FK Ho, CA Celis-Morales, SR Gray, SV Katikireddi, CL Niedzwiedz, C Hastie, DM Lyall, DL Ferguson, C Berry, DF Mackay, J Gill, M Gill, R Gill, JP Pell, N Sattar, PI Welsh United Kingdom No Data
5/1/2020 Liver Enzyme Elevation in Coronavirus Disease 2019: A Multicenter, Retrospective, Cross-Sectional Study SR Hao China No Data
5/1/2020 COVID-19 severe pneumonia in Mexico City - First experience in a Mexican hospital B Valente-Acosta, I Hoyo-Ulloa, L Espinosa-Aguilar, R Mendoza-Aguilar, J Garcia-Guerrero, D Ontanon-Zurita, B Gomez-Gomez, O Fueyo-Rodriguez, JM Vera-Zertuche, R Anzola-Arias, JV Jimenez-Ceja, D Horta-Capinteyro, C Olvera-Guzman, J Aguirre-Sanchez, J Franco-Granillo, L Jauregui-Camargo, E Sada-Diaz, R Saavedra-Perez-Salas, A Palomar-Lever, F Moreno-Sanchez Mexico No Data
4/29/2020 Current Smoking Is Not Associated With COVID-19 M Rossato, L Russo, S Mazzocut, A Di Vincenzo, P Fioretto, R Vettor Italy No Data
4/28/2020 Features of 16,749 hospitalised UK patients with COVID-19 using the ISARIC WHO Clinical Characterisation Protocol AB Docherty, EM Harrison, CA Green, HE Hardwick, R Pius, L Norman, KA Holden, JM Read, F Dondelinger, G Carson, L Merson, J Lee, D Plotkin, L Sigfrid, S Halpin, C Jackson, C Gamble, PW Horby, JS Nguyen-Van-Tam, J Dunning, PJ Openshaw, JK Baillie, MG Semple United Kingdom No Data
4/27/2020 Association Between Clinical Manifestations and Prognosis in Patients With COVID-19 Y Tao, C Shaohang, Z Zhidan, C Xuejuan, L Yuanyuan, Y Sichun, J Peng, X Xuwen China No Data
4/25/2020 COVID-19 Fatality and Comorbidity Risk Factors among Confirmed Patients in Mexico P Solis, H Carreno Mexico No Data
4/24/2020 Retrospective study of risk factors for severe SARS-Cov-2 infections in hospitalized adult patients. Yao Q, Wang P, Wang X, et al. China No Data
4/24/2020 Predicting mortality attributable to SARS-CoV-2: A mechanistic score relating obesity and diabetes to COVID- 19 outcomes in Mexico. Bello-Chavolla OY, Bahena-Lopez JP, Antonio-Villa NE, et al. Mexico No Data
4/23/2020 Systematic review of the prevalence of current smoking among hospitalized COVID‑19 patients in China: could nicotine be a therapeutic option? K Farsalinos, A Barbouni, R Niaura China No Data
4/23/2020 Risk factors of critical & mortal COVID-19 cases: A systematic literature review and meta-analysis. Z Zheng, F Peng, B Xu, J Zhao, H Liu, J Peng, Q Li, C Jiang, Y Zhou, S Liu, C Ye, P Zhang, Y Xing, H Guo, W Tang China No Data
4/23/2020 Smoking habit and hospitalization for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-related pneumonia: The unsolved paradox behind the evidence. G Garufi, L Carbognin, A Orlandi, G Tortora, E Bria China No Data
4/23/2020 Clinical Characteristics of 20,662 Patients with COVID-19 in mainland China: A Systemic Review and Meta-analysis C Tang, K Zhang, W Wang, Z Pei, Z Liu, P Yuan, Z Guan, J Gu China No Data
4/20/2020 Epidemiology, clinical course, and outcomes of critically ill adults with COVID-19 in New York City: a prospective cohort study MJ Cummings, MR Baldwin, D Abrams, SD Jacobson, BJ Meyer, EM Balough, JG Aaron, J Claassen, LE Rabbani, J Hastie, BR Hochman, J Salazar-Schicchi, NH Yip, D Brodie, MR O'Donnell USA No Data
4/20/2020 Low Incidence of Daily Active Tobacco Smoking in Patients with Symptomatic COVID-19 M Miyara, F Tubach, V Pourcher, C Morelot-Panzini, J Pernet, J Haroche, S Lebbah, E Morawiec, G Gorochov, E Caumes, P Hausfater, A Combes, T Similowski, Z Amoura France No Data
4/17/2020 Clinical Characteristics of Covid-19 in New York City. Goyal P, Choi JJ, Pinheiro LC, et al. USA No Data
4/17/2020 Obesity as a Risk Factor for Greater Severity of COVID-19 in Patients With Metabolic Associated Fatty Liver Disease KI Zheng, F Gao, X Wang, Q Sun, K Pan, T Wang, H Ma, W Liu, J George, M Zheng China No Data
4/16/2020 Smoking is Associated with COVID-19 Progression: A Meta-Analysis R Patanavanich, SA Glantz No Data
4/15/2020 The Impact of COPD and Smoking History on the Severity of Covid-19: A Systemic Review and Meta-Analysis Q Zhao, M Meng, R Kumar, Y Wu, J Huang, N Lian, Y Deng, S Lin China No Data
4/15/2020 Covid-19 Testing, Hospital Admission, and Intensive Care Among 2,026,227 United States Veterans Aged 54-75 Years CT Rentsch, F Kidwai-Khan, JP Tate, LS Park, JT King Jr., M Skanderson, RG Hauser, A Schultze, CI Jarvis, M Holodniy, V Lo Re III, KM Akgun, K Crothers, TH Taddei, MS Freiberg, AC Justice USA No Data
4/15/2020 Associations of clinical characteristics and antiviral drugs with viral RNA clearance in patients with COVID-19 in Guangzhou, China: a retrospective cohort study X Chen, Y Zhang, B Zhu, J Zeng, W Hong, X He, J Chen, H Zheng, S Qiu, Y Deng, J Chan, J Wang China No Data
4/13/2020 Factors associated with hospitalization and critical illness among 4,103 patients with COVID-19 disease in New York City CM Petrilli, SA Jones, J Yang, H Rajagopalan, LF O'Donnell, Y Chernyak, K Tobin, RJ Cerfolio, F Francois, LI Horwitz USA No Data
4/13/2020 Key to successful treatment of COVID-19: accurate identification of severe risks and early intervention of disease progression M Chen, C Tu, C Tan, X Zheng, X Wang, J Wu, Y Huang, Z Wang, Y Yan, Z Li, H Shan, J Liu, J Huang China No Data
4/13/2020 The characteristics of 50 hospitalized COVID-19 patients with and without ARDS M Dreher, A Kersten, J Bickenbach, P Balfanz, B Hartmann, C Cornelissen, A Daher, R Stöhr, M Kleines, SW Lemmen, JC Brokmann, T Müller, D Müller-Wieland, G Marx, N Marx Germany No Data
4/10/2020 Clinical and epidemiological characteristics of Coronavirus Disease 2019 (COVID-19) patients SC Tan Primarily China No Data
4/10/2020 Prevalence of Comorbidities in COVID-19 Patients: A Systematic Review and Meta-Analysis. A Baradaran, MH Ebrahimzadeh, A Baradaran, AR Kachooei China No Data
4/10/2020 The relationship of COVID-19 severity with cardiovascular disease and its traditional risk factors: A systematic review and meta-analysis K Matsushita, N Ding, M Kou, X Hu, M Chen, Y Gao, Y Honda, D Dowdy, Y Mok, J Ishigami, LJ Appel China No Data
4/10/2020 Case fatality rate in COVID-19: a systematic review and meta-analysis CN Kahathuduwa, CS Dhanasekara, S-H Chin China No Data
4/9/2020 COVID-19 and smoking I Berlin, D Thomas, A-L Le Faou, J Cornuz China No Data
4/9/2020 Correction to Sex difference and smoking predisposition in patients with COVID-19 No Data
4/8/2020 Collision of the COVID-19 and Addiction Epidemics ND Volkow Global No Data
4/6/2020 Virologic and clinical characteristics for prognosis of severe COVID-19: a retrospective observational study in Wuhan, China S Fu, X Fu, Y Song, M Li, P-h Pan, T Tang, C Zhang, T Jiang, D Tan, X Fan, X Sha, J Ma, Y Huang, S Li, Y Zheng, Z Qian, Z Xiong, L Xiao, H Long, J Chen, Y Ouyang China No Data
4/2/2020 Smoking and COVID-19: Rapid evidence review for the Royal College of Physicians, London (UK) D Simons, J Brown, L Shahab, O Perski China No Data
4/1/2020 The COVID-19 infection in Italy: a statistical study of an abnormally severe disease G De Natale, V Ricciardi, G De Luca, D De Natale, G Di Meglio, A Ferragamo, V Marchitelli, A Piccolo, A Scala, R Somma, E Spina, C Troise Italy No Data
4/1/2020 Risk factors for severe corona virus disease 2019 (COVID-19) patients : a systematic review and meta analysis L Xu, M Yaqian, Gang Chen China No Data
4/1/2020 Preliminary Estimates of the Prevalence of Selected Underlying Health Conditions Among Patients with Coronavirus Disease 2019 — United States, February 12–March 28, 2020 Centers for Disease Control and Prevention; N Chow, K Fleming-Dutra, R Gierke, A Hall, M Hughes, T Pilishvili, M Ritchey, K Roguski, T Skoff, E Ussery USA No Data
3/31/2020 Comorbidity and its impact on 1,590 patients with COVID-19 in China: A Nationwide Analysis W-j Guan, W-h Liang, Y Zhao, H-r Liang, Z-s Chen, Y-m Li, X-q Liu, R-c Chen, C-l Tang, T Wang, C-q Ou, L Li, P-y Chen, L Sang, W Wang, J-f Li, C-c Li, L-m Ou, B Cheng, S Xiong, Z-y Ni, Y Hu, J Xiang, L Liu, H Shan, C-l Lei, Y-x Peng, L Wei, Y Liu, Y-h Hu, P Peng, J-m Wang, J-y Liu, Z Chen, G Li, Z-j Zheng, S-q Qiu, J Luo, C-j Ye, S-y Zhu, L-l Cheng, F Ye, S-y Li, J-p Zheng, N-f Zhang, N-s Zhong, J-x He China No Data
3/31/2020 Is nicotine exposure linked to cardiopulmonary vulnerability to COVID-19 in the general population? J Olds, N Kabbani China No Data
3/31/2020 Smokeless tobacco use and the COVID-19 pandemic A Singh, P Chaturvedi India No Data
3/30/2020 Factors associated with prolonged viral shedding and impact of Lopinavir/Ritonavir treatment in patients with SARS-CoV-2 infection D Yan, X-y Liu, Y-n Zhu, L Huang, B-t Dan, G-j Zhang, Y-h Gao China No Data
3/30/2020 Radiographic Findings and other Predictors in Adults with Covid-19 K Li, D Chen, S Chen, Y Feng, C Chang, Z Wang, N Wang, G Zhen China No Data
3/30/2020 Case-Fatality Rate and Characteristics of Patients Dying in Relation to COVID-19 in Italy G Onder, G Rezza, S Brusaferro No Data
3/27/2020 Prevalence, Severity and Mortality associated with COPD and Smoking in patients with COVID-19: A Rapid Systematic Review and Meta-Analysis JS Alqahtani, T Oyelade, AM Aldhahir, SM Alghamdi, M Almehmadi, AS Alqahtani, S Quaderi, S Mandal, J Hurst Primarily China No Data
3/26/2020 Risk Factors Associated with Clinical Outcomes in 323 COVID-19 Patients in Wuhan, China L Hu, S Chen, Y Fu, Z Gao, H Long, H-w Ren, Y Zuo, H Li, J Wang, Q-b Xv, W-x Yu, J Liu, C Shao, J-j Hao, C-z Wang, Y Ma, Z Wang, R Yanagihara, J-m Wang, Y Deng China No Data
3/25/2020 Smoking, vaping and hospitalization for COVID-19 K Farsalinos, A Barbouni, R Niaura China No Data
3/24/2020 Epidemiological and clinical features of 125 Hospitalized Patients with COVID-19 in Fuyang, Anhui, China R Wang, M Pan, X Zhang, X Fan, M Han, F Zhao, M Miao, J Xu, M Guan, X Deng, X Chen, L Shen China No Data
3/24/2020 Prevalence of Underlying Diseases in Hospitalized Patients With COVID-19: A Systematic Review and Meta-Analysis A Emami, F Javanmardi, N Pirbonyeh, A Akbari China No Data
3/24/2020 COVID-19 clinical characteristics, and sex-specific risk of mortality: Systematic Review and Meta-analysis MJ Nasiri, S Haddadi, A Tahvildari, Y Farsi, M Arbabi, S Hasanzadeh, P Jamshidi, M Murthi, M Mirsaeidi China No Data
3/24/2020 A comparative multi-centre study on the clinical and imaging features of comfirmed and uncomfirmed patients with COVID-19 C Miao, J Zhuang, M Jin, H Xiong, P Huang, Q Zhao, L Miao, J Du, X Yang, P Huang, J Hong China No Data
3/20/2020 COVID-19 and Smoking: A Systematic Review of the Evidence C Vardavas, K Nikitara China No Data
3/20/2020 Incidence, clinical characteristics and prognostic factor of patients with COVID-19: a systematic review and meta-analysis X Zhao, B Zhang, P Li, C Ma, J Gu, P Hou, Z Guo, H Wu, Y Bai China No Data
3/16/2020 Clinical characteristics of refractory COVID-19 pneumonia in Wuhan, China P Mo, Y Xing, Y Xiao, L Deng, Q Zhao, H Wang, Y Xiong, Z Cheng, S Gao, K Liang, M Luo, T Chen, S Song, Z Ma, X Chen, R Zheng, Q Cao, F Wang, Y Zhang China No Data
3/13/2020 Initial clinical features of suspected Coronavirus Disease 2019 in two emergency departments outside of Hubei, China. Journal of Medical Virology W Zhu, K Xie, H Lu, L Xu, S Zhou, S Fang China No Data
3/12/2020 Active Smoking Is Not Associated With Severity of Coronavirus Disease 2019 (COVID-19) G Lippi, BM Henry China No Data
3/12/2020 Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study F Zhou, T Yu, R Du, G Fan, Y Liu, Z Liu, J Xiang, Y Wang, B Song, X Gu, L Guan, Y Wei, H Li, X Wu, J Xu, S Tu, Y Zhang, H Chen, B Cao China No Data
3/12/2020 Epidemiological and clinical characteristics of COVID-19 in adolescents and young adults J Liao, S Fan, J Chen, J Wu, S Xu, Y Guo, C Li, X Zhang, C Wu, H Mou, C Song, F Li, G Wu, J Zhang, L Guo, H Liu, J Lv, L Xu, C Lang China No Data
3/11/2020 Sex difference and smoking predisposition in patients with COVID-19 H Cai China No Data
3/10/2020 Clinical Characteristics of SARS-CoV-2 Pneumonia Compared to Controls in Chinese Han Population Y Xu, Y-r Li, Q Zeng, Z-b Lu, Y-z Li, W Wu, S-y Dong, G Huang, X-h Wang China No Data
3/10/2020 Clinical Characteristics of Coronavirus Pneumonia 2019 (COVID-19): An Updated Systematic Review Z Fang, F Yi, K Wu, K Lai, X Sun, N Zhong, Z Liu China No Data
2/28/2020 Analysis of factors associated with disease outcomes in hospitalized patients with 2019 novel coronavirus disease. W Liu, Z-w Tao, W Lei, Y Ming-Li, L Kui, Z Ling, W Shuang, D Yan, L Jing, H-g Liu, Y Ming, H Yi China No Data
2/28/2020 Clinical Characteristics of Coronavirus Disease 2019 in China W-j Guan, Z-y Ni, Y Hu, W-h Liang, C-q Ou, J-x He, L Liu, H Shan, C-l Lei, D Hui, B Du, L-j Li, et al. China No Data
2/24/2020 Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China C Huang, Y Wang, X Li, L Ren, J Zhao, Y Hu, L Zhang, G Fan, J Xu, X Gu, Z Cheng, T Yu, J Xia, Y Wei, W Wu, X Xie, W Yin, H Li,M Liu, Y Xiao, H Gao, L Guo, J Xie, G Wang, R Jiang, Z Gao, Q Jin, J Wang, B Cao China No Data
2/21/2020 Chest CT Findings in Patients With Coronavirus Disease 2019 and Its Relationship With Clinical Features J Wu, X Wu, W Zeng, D Guo, Z Fang, L Chen, H Huang, C Li China No Data
2/21/2020 Clinical course and outcomes of critically ill patients with SARS-CoV-2 pneumonia in Wuhan, China: a single-centered, retrospective, observational study X Yang, Y Yu, J Xu, H Shu, J Xia, H Liu, Y Wu, L Zhang, Z Yu, M Fang, T Yu, Y Wang, S Pan, X Zou, S Yuan, Y Shang China No Data
2/19/2020 Clinical characteristics of 140 patients infected with SARS-CoV-2 in Wuhan, China J-j Zhang, X Dong, Y-y Cao, Y-d Yuan, Y-b Yang, Y-q Yan, CA Akdis, Y-d Gao China No Data
1/6/2020 COVID-19 with Different Severity: A Multi-center Study of Clinical Features. Feng Y, Ling Y, Bai T , et al. China No Data