First Author;Title;Article ID;First author's country of affiliation;Study design;Study country;Study WHO Region;Study period (mmmyyyy);Study end (month) ;Study sample ;SARS-CoV-2 infection diagnosis;
Akbari, M;Investigation of the Epidemiological Situation and the Incidence of Covid 19 Disease in an Area of Markazi Province in Iran Country;10.12865/CHSJ.47.01.03;Iran;Cross-sectional study;Iran;Eastern Mediterranean Region;Feb/2020 to Sep/2020;;Inpatients/Outpatients;Not confirmed/unclear/mixed;
Almeida, PD;Space-time analysis of covid-19 in a brazilian state;10.18471/rbe.v35.42740;Brasil;Ecological study;Brasil;Americas;Mar/2020 to Sep/2020;;General population;Not confirmed/unclear/mixed;
Anwar, F;Molecular epidemiology of SARS-COV-2 in Mardan, Khyber Pakhtunkhwa Pakistan: A real world clinical experience;covidwho-1411152;Pakistan;Cross-sectional study;Pakistan;Eastern Mediterranean Region;Mar/2020 to Jul/2020;;Inpatients/Outpatients;Confirmed;
Azarpazhooh, MR;COVID-19 Pandemic and Burden of Non-Communicable Diseases: An Ecological Study on Data of 185 Countries.;10.1016/j.jstrokecerebrovasdis.2020.105089;Canada;Ecological study;Worldwide;Worldwide;Feb/2020 to May/2020;;General population;Confirmed;
Bernard, A;Comparison of cancer patients to non-cancer patients among covid-19 inpatients at a national level;10.3390/cancers13061436;France;Cohort study;France ;European Region;Mar/2020 to Apr/2020;;General population;Confirmed;
Bi, Q;Epidemiology and transmission of COVID-19 in 391 cases and 1286 of their close contacts in Shenzhen, China: a retrospective cohort study;10.1016/S1473-3099(20)30287-5;United States of America;Cohort study;China;Western Pacific Region;Jan/2020 to Feb/2020;;General population;Confirmed;
COVID-19 APHP-Universities-INRIA-INSERM Group;Early indicators of intensive care unit bed requirement during the COVID-19 epidemic: A retrospective study in Ile-de-France region, France;10.1371/journal.pone.0241406;France;Cross-sectional study;France ;European Region;Feb/2020 to Sept/2020;;Inpatients/Outpatients;Not confirmed/unclear/mixed;
Castilla, J;Risk Factors of Infection, Hospitalization and Death from SARS-CoV-2: A Population-Based Cohort Study.;10.3390/jcm10122608;Spain;Cohort study;Spain;European Region;Jul/2020 to Dec/2020;;General Population;Confirmed;
Chen, R;Risk Factors of Fatal outcome in Hospitalized Subjects with Coronavirus Disease 2019 From a Nationwide Analysis in China ;10.1016/j.chest.2020.04.010;China;Cohort study;China;Western Pacific Region;Jan/2020;;Hospitalised patients;Confirmed;
Cummings, MJ;Epidemiology, clinical course, and outcomes of critically ill adults with COVID-19 in New York City: a prospective cohort study.;10.1016/S0140-6736(20)31189-2.;United States of America;Cohort study;USA;Americas;Mar/2020  to Apr/2020;;Patients in/requiring ICU;Confirmed;
D´Silva, KM;COVID-19 Outcomes in Patients With Systemic Autoimmune Rheumatic Diseases Compared to the General Population: A US Multicenter, Comparative Cohort Study.;10.1002/art.41619;United States of America;Cohort study;USA;Americas;Jan/2020 to Aug/2020;;Inpatients/Outpatients;Not confirmed/unclear/mixed;
Ekezie, I;A population analysis of the initial SARS-CoV-2 outbreak in Chicago: Implications for the future;10.25270/con.2020.09.00010;United Kingdom;Cross-sectional study;USA;Americas;Apr/2020 to May/2020 ;;General population;Not confirmed/unclear/mixed;
Fried, MV;Patient Characteristics and Outcomes of 11 721 Patients With Coronavirus Disease 2019 (COVID-19) Hospitalized Across the United States.;10.1093/cid/ciaa1268;United States of America;Cohort study;USA;Americas;Feb/2020 to Apr/2020;;Hospitalised patients;Confirmed;
Gao, M;Associations between body-mass index and COVID-19 severity in 6·9 million people in England: a prospective, community-based, cohort study.;10.1016/S2213-8587(21)00089-9;United Kingdom;Cohort study;England;European Region;Jan/2020 to Apr/2022;;General population;Not confirmed/unclear/mixed;
Garay, F;SARS-CoV-2 in eight municipalities of the Colombian tropics: high immunity, clinical and sociodemographic outcomes.;10.1093/trstmh/trab094;Colombia;Cross-sectional study;Colombia;Americas;Jul/2020 to Nov/2020;;General Population;Confirmed;
Girardin, JL;Contribution of pulmonary diseases to COVID-19 mortality in a diverse urban community of New York.;10.1177/1479973120986806;United States of America;Cohort study;USA;Americas;Mar/2020 to May/2020;;Inpatients/Outpatients;Confirmed;
Goswami, RP;Endemic infections, vaccinations, and variability of SARS-COV2 worldwide epidemiology: A cross-sectional study.;10.1002/jmv.26875;India;Cross-sectional study;Worlwide;Worldwide;Dec/2019 to Jun/2020;;General population;Not confirmed/unclear/mixed;
Gray,WK;Variability in COVID-19 in-hospital mortality rates between national health service trusts and regions in England: A national observational study for the Getting It Right First Time Programme.;10.1016/j.eclinm.2021.100859;United Kingdom;Cohort study;United Kingdom;European Region;Mar/2020 to Jul/2020;;Hospitalised patients;Confirmed;
Hawkins, RB;Socio-economic status and COVID-19-related cases and fatalities;10.1016/j.puhe.2020.09.016;United States of America;Ecological study;USA;Americas;May/2020;;General population ;Not confirmed/unclear/mixed;
Hodges, G;Association between biomarkers and COVID-19 severity and mortality: a nationwide Danish cohort study.;10.1136/bmjopen-2020-041295;Denmark;Cohort study;Denmark;European Region;Feb/2020 to Apr/2020;;Hospitalised patients;Confirmed;
Hohl, A;Daily surveillance of COVID-19 using the prospective space-time scan statistic in the United States;10.1016/j.sste.2020.100354;United States of America;Ecological study;USA;Americas;Jan/2020 to Jun/2020;;General population;Confirmed;
Holler, JG;First wave of COVID-19 hospital admissions in Denmark: a Nationwide population-based cohort study.;10.1186/s12879-020-05717-w;Denmark;Cohort study;Denmark;European Region;Feb/2020 to Apr/2020;;Hospitalised patients;Confirmed;
Houvèssou, GM;Lockdown-type containment measures for COVID-19 prevention and control: a descriptive ecological study with data from South Africa, Germany, Brazil, Spain, United States, Italy and New Zealand, February - August 2020.;10.1590/S1679-49742021000100025;Brasil;Ecological study;Worldwide;Worldwide;Feb/2020 to Aug/2020;;General population;Not confirmed/unclear/mixed;
Huang, L;Effectiveness of interventions as part of the One Health approach to control coronavirus disease 2019 and stratified case features in Anhui Province, China: A real-world population-based cohort study;10.1016/j.onehlt.2021.100224;China;Cohort study;China;Western Pacific Region;Jan/2020 to Jun/2020;;General population;Confirmed;
Hussein, NR;A retrospective descriptive study characterizing coronavirus disease epidemiology among people in the Kurdistan Region, Iraq;10.4084/mjhid.2020.061;Iraq;Cross-sectional study;Iraq;Eastern Mediterranean Region;Mar/2020 to May/2020;;General population;Confirmed;
Ioannidis JPA;Population-level COVID-19 mortality risk for non-elderly individuals overall and for non-elderly individuals without underlying diseases in pandemic epicenters.;10.1016/j.envres.2020.109890;United States of America;Cross-sectional study;Worldwide;Worldwide;Apr/2020;;General population;Confirmed;
Jen, TH;Geographic risk assessment of COVID-19 transmission using recent data: An observational study.;10.1097/MD.0000000000020774;Taiwan;Ecological study;Worldwide;Worldwide;Mar/2020;;General population;Not confirmed/unclear/mixed;
Jing, QL;Household secondary attack rate of COVID-19 and associated determinants in Guangzhou, China: a retrospective cohort study;10.1016/S1473-3099(20)30471-0;China;Cohort study;China;Western Pacific Region;Jan/2020 to Feb/2020;;Close contacts ;Confirmed;
Joyner, MJ;Convalescent Plasma Antibody Levels and the Risk of Death from Covid-19.;10.1056/NEJMoa2031893;United States of America;Cohort study;USA;Americas;"Apr/2020 to Jul/2020
";;Hospitalised patients;Confirmed;
Kanecki, K;Hospitalizations for COVID-19 in Poland: a study based on data from a national hospital register.;10.20452/pamw.15946;Poland;Cohort study;Poland;European Region;Feb/2020 to Sep/2021;;Hospitalised patients;Confirmed;
Khamis, F;Epidemiology of COVID-19 infection in Oman: Analysis of the first 1304 cases;10.5001/omj.2020.60;Oman;Cross-sectional study;Oman;Eastern Mediterranean Region;Feb/2020 to Apr 2020;;General population;Confirmed;
Kumar, A;Shifting US Patterns of COVID-19 Mortality by Race and Ethnicity From June-December 2020;10.1016/j.jamda.2021.02.034;United States of America;Cohort study;USA;Americas;Jun/2020 to Dec/2020;;People living in LTCF;Confirmed;
Kumar, G;Clinical profile of hospitalized COVID-19 patients in first & second wave of the pandemic: Insights from an Indian registry based observational study.;10.4103/ijmr.ijmr_1628_21;India;Cohort study;India;South-East Asia Region;Sep/2020 to Jan/2021;;Hospitalised patients;Confirmed;
Laake, JH;Characteristics, management and survival of ICU patients with coronavirus disease-19 in Norway, March-June 2020. A prospective observational study.;10.1111/aas.13785;Norway;Cohort study;Norway;European Region;Mar/2020 to Jun/2020;;Patients in/requiring ICU;Not confirmed/unclear/mixed;
Lee JH;Effect of sex hormones on coronavirus disease 2019: an analysis of 5,061 laboratory-confirmed cases in South Korea.;10.1016/S2215-0366(20)30421-1;South Korea;Cohort study;South Korea;Western Pacific Region;Jan/2020 to Apr/2020;;General population;Confirmed;
Lee, SW ;Severe clinical outcomes of COVID-19 associated with proton pump inhibitors: a nationwide cohort study with propensity score matching;10.1136/gutjnl-2020-322248;South Korea;Cohort study;"South 
Korea
";Western Pacific Region;Jan/2020 to May/2020;;General population;Confirmed;
Liao, TF;Association of Social and Economic Inequality With Coronavirus Disease 2019 Incidence and Mortality Across US Counties.;10.1001/jamanetworkopen.2020.34578;United States of America;Ecological study;USA;Americas;Jan/2020 to Aug/2020;;General population;Not confirmed/unclear/mixed;
Flores López, MG;Regional Distribution Of COVID-19 Mortality In Peru;10.25176/RFMH.v21i2.3721;Peru;Ecological study;Peru;Americas;Mar/2020 to Sep/2020;;Dead;Confirmed;
Meyers, KJ;A cross-sectional community-based observational study of asymptomatic SARS-CoV-2 prevalence in the greater Indianapolis area.;10.1002/jmv.26182;United States of America;Cross-sectional study;USA;Americas;Apr/2020 to May/2020;;General population;Confirmed;
Monari, C;More Severe COVID-19 in Patients With Active Cancer: Results of a Multicenter Cohort Study.;10.3389/fonc.2021.662746;Italy;Cohort study;Italy;European Region;Feb/2020 to May/2020;;Inpatients/Outpatients;Confirmed;
Mutnal, MB;Early trends for SARS-CoV-2 infection in central and north Texas and impact on other circulating respiratory viruses.;10.1002/jmv.26010;United States of America;Cohort study;USA;Americas;Mar/2020;;General population;Confirmed;
Nurchis, MC;Impact of the Burden of COVID-19 in Italy: Results of Disability-Adjusted Life Years (DALYs) and Productivity Loss.;10.3390/ijerph17124233;Italy;Ecological study;Italy;European Region;Feb/2020 to Apr/2020;;General population;Not confirmed/unclear/mixed;
Oh, TK;Musculoskeletal Disorders, Pain Medication, and in-Hospital Mortality among Patients with COVID-19 in South Korea: A Population-Based Cohort Study.;10.3390/ijerph18136804;South Korea;Cohort study;South Korea;Western Pacific Region;Jan/2020 to Jun/2020;;General population;Confirmed;
Padilla-Raygoza, N;Status of novel coronavirus disease and analysis of mortality in Mexico, until June 30th, 2020: an ecological study;10.13005/bpj/2053;Mexico;Ecological study;Mexico;Americas;Jan/2020 to Jun/2020;;General population;Confirmed;
Pana, TA;Country-level determinants of the severity of the first global wave of the COVID-19 pandemic: an ecological study.;10.1136/bmjopen-2020-042034;United Kingdom;Ecological study;Worldwide;Worldwide;Dec/2019 to Jun/2020;;General population;Confirmed;
Ramaswamy, S;Cross-sectional study on sero-prevalence of SARS-CoV-2 infection in Jabalpur, Madhya Pradesh, India;0.24321/0019.5138.202114;India;Cross-sectional study;India;South-East Asia Region;Dec/2020 ;;General population;Confirmed;
Ramirez, IJ;COVID-19 emergence and social and health determinants in Colorado: a rapid spatial analysis;10.3390/ijerph17113856;United States of America;Cross-sectional study;USA;Americas;Mar/2020 to Apr/2020;;General population;Not confirmed/unclear/mixed;
Ranjan, A;Socio-economic inequality in national incidence and mortality rates of COVID-19 in India: An Ecological Study;10.47203/IJCH.2020.v32i04.010;India;Ecological study;India;South-East Asia Region;Nov/2020;;General population;Confirmed;
Rauscher, E;Unequal Opportunity Spreaders: Higher COVID-19 Deaths with Later School Closure in the United States;10.1177/07311214211005486;United States of America;Ecological study;USA;Americas;Jun/2020 to Dec/2020;;General population;Confirmed;
Rezabeigi-Davarani, E;Epidemiological and clinical characteristics of covid-19 patients studied by jiroft university of medical sciences: Southeast of Iran;10.30699/jambs.29.136.302;Iran;Cohort study;Iran;Eastern Mediterranean Region;Feb/2020 to Jul/2020 ;;General population;Confirmed;
Richardson, D;Use of the first National Early Warning Score recorded within 24 hours of admission to estimate the risk of in-hospital mortality in unplanned COVID-19 patients: a retrospective cohort study.;10.1136/bmjopen-2020-043721;United Kingdom;Cohort study;United Kingdom;European Region;March/2020 to June/2020;;Hospitalised patients;Confirmed;
Royo-Cebrecos, C;Mass SARS-CoV-2 serological screening, a population-based study in the Principality of Andorra.;10.1016/j.lanepe.2021.100119;Andorra;Cross-sectional study;Andorra;European Region;Jun/2020;;General Population;Confirmed;
Rubio-Rivas, M;Risk Categories in COVID-19 Based on Degrees of Inflammation: Data on More Than 17,000 Patients from the Spanish SEMI-COVID-19 Registry.;10.3390/jcm10102214;Spain;Cohort study;Spain;European Region;Mar/2020 to Jul/2020;;Hospitalised patients;Confirmed;
Sahoo, H;Burden of COVID-19 pandemic in India: perspectives from health infrastructure. ;covidwho-923142;India;Ecological study;India;South-East Asia Region;May/2020;;General population;Confirmed;
Salyer, SJ;The first and second waves of the COVID-19 pandemic in Africa: a cross-sectional study.;10.1016/S0140-6736(21)00632-2;United States of America;Cross-sectional study;Africa;African region;Feb/2020 to Dec/2020;;General population;Confirmed;
Seyhan, AU;Demographic characteristics of patients with possible or definitive COVID-19 diagnosis transported by 112 emergency health services ambulance;10.14744/scie.2021.54871;Turkey;Cross-sectional study;Turkey;European Region;Mar/2020 to Jun/2020 ;;Inpatients/Outpatients;Confirmed;
Shahriarirad, R;Epidemiological and clinical features of 2019 novel coronavirus diseases (COVID-19) in the South of Iran.;10.1186/s12879-020-05128-x;Iran;Cohort study;Iran;Eastern Mediterranean Region;Feb/2020 to Mar/2020;;Hospitalised patients;Confirmed;
Shallcross, L;Factors associated with SARS-CoV-2 infection and outbreaks in long-term care facilities in England: a national cross-sectional survey.;10.1016/S2666-7568(20)30065-9;United Kingdom;Cross-sectional study;United Kingdom;European Region;May/2020 to Jun/2020;;People living in LTCF;Confirmed;
Soria, MLJB;The philippine coronavirus disease 2019 (Covid-19) profile study: Clinical profile and factors associated with mortality of hospitalized patients;covidwho-1283133;Philippines;Cohort study ;Philippines;Western Pacific Region;Feb/2020 to Jul/2020;;Hospitalised patients;Confirmed;
Stokes, AC;COVID-19 and excess mortality in the United States: A county-level analysis.;0.1371/journal.pmed.1003571;United States of America;Ecological study;USA;Americas;Jan/2020 to Dec/2020;;General population;Confirmed;
Sung, HK;Clinical Course and Outcomes of 3,060 Patients with Coronavirus Disease 2019 in Korea, January-May 2020.;10.3346/jkms.2020.35.e280;South Korea;Cohort study;South Korea;Western Pacific Region;Jan/2020 to May/2020;;Inpatients/Outpatients;Confirmed;
Telle, K;Factors associated with hospitalization, invasive mechanical ventilation treatment and death among all confirmed COVID-19 cases in Norway: Prospective cohort study.;10.1177/1403494820985172;Norway;Cohort study;Norway;European Region;Jan/2020 to Jun/2020;;Inpatients/Outpatients;Confirmed;
Terada, M;Risk factors for severity on admission and the disease progression during hospitalisation in a large cohort of patients with COVID-19 in Japan.;10.1136/bmjopen-2020-047007;Japan;Cohort study;Japan;Western Pacific Region;Jan/2020 to May/2020;;Hospitalised patients;Confirmed;
Tesoriero, JM;COVID-19 Outcomes Among Persons Living With or Without Diagnosed HIV Infection in New York State.;10.1001/jamanetworkopen.2020.37069;United States of America;Cohort study;USA;Americas;Mar/2020 to Jun/2020;;Hospitalised patients;Confirmed;
Timelli, L;Effect of timing of implementation of containment measures on Covid-19 epidemic. The case of the first wave in Italy.;10.1371/journal.pone.0245656;Italy;Ecological study;Italy;European Region;Feb/2020 to May/2023;;General population;Confirmed;
Turista, DDR;Distribution of COVID-19 and phylogenetic tree construction of sars-CoV-2 in Indonesia;10.22207/JPAM.14.SPL1.42 ;Indonesia;Cross-sectional study;Indonesia;South-East Asia Region;Mar/2020 to May/2020;;General population;Not confirmed/unclear/mixed;
Wibowo, Y;Characteristics, effective reproduction number (Rt), and prediction sir model of covid-19 at banyumas district, central java, indonesia;10.37506/MLU.V21I1.2483;Indonesia;Ecological study;Indonesia;South-East Asia Region;Mar/2020 to Jun/2020;;General population;Confirmed;
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