COVID-19 & Tobacco Use
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 340 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 05/07/21. 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 |
|---|---|---|---|---|
| 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 |
| 4/19/2021 | 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 |
| 4/16/2021 | 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 | COVID-19 OUT COMES IN MS EARLY EXPERIENCE FROM NYU MULT IPLE SCLEROSIS COMPREHENSIVE CARE CENT ER. | Parrotta E, Kister I, Charvet L, et al. | USA | 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 | "VAPING AND SARS-CoV-2 AND COVID-19 TECHNICAL INFORMATION FOR VAPERS" | R Sussman, C Escrig | 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 |