Imam 2020.

Study characteristics
Notes	English title Independent correlates of hospitalization in 2040 patients with COVID‐19 at a large hospital system in Michigan, United States Study setting Start of study recruitment (MM/YYYY): NR End of study recruitment (MM/YYYY): 04/2020 Study design: Retrospective cohort Study centre(s): Multiple centres/clinics/areas within a country Number of centres, clinics or areas: 8 Study setting: Outpatient and inpatient Number of participants recruited: 2040 Sampling method: NR Participants Female participants (absolute number): NR Age measure, value: NR Inclusion criteria: NR Exclusion criteria: NR Smoking frequency: NR Diabetes frequency: NR Hypertension frequency: NR Cardiovascular disease frequency: NR Asthma frequency: NR Chronic obstructive pulmonary disease frequency: NR Other pulmonary disease frequency: NR Immunosuppression frequency: NR Chronic kidney disease frequency: NR Cancer frequency: NR Steroid administration frequency: NR Supplemental oxygen administration frequency: NR Other treatments (frequency): NR Prognostic factor(s) Study’s definition for obesity: BMI > 30 kg/m2 The time when obesity has been measured: NR Main variable used for determination of obesity: BMI Threshold used for definition: 30 Obesity frequency (absolute number):  Prognostic factor(s): BMI > 30 kg/m2 Outcome(s) Hospitalisation Outcome (prognostic factor) Hospitalisation (BMI > 30 kg/m2) Follow‐up Number of patients followed completely for the outcome: 2040 Number of obese patients followed completely for the outcome: NR Number of non‐obese patients followed completely for the outcome: NR Univariable unadjusted analysis for obesity Effect measure for obesity: Odds ratio Effect measure value (95% CI), P value: 1.5 (1.2, 1.9), 0.002 Multivariable analysis for obesity Modelling method: Logistic regression The set of prognostic factors used for adjustment: Age, CCI, race, ACEI/ARB use, BMI > 30, tachycardia (HR > 100), tachypnoea (RR < 20), hypoxia (sPO2 < 90%) Effect measure for obesity: Odds ratio Effect measure value (95% CI), P value: 1.8 (1.4, 2.4), < 0.0005
Item	Authors' judgement	Support for judgement
Study Participation	No	Appendix 3
Study Attrition Hospitalisation	Yes	Appendix 3
Prognostic Factor Measurement	Yes	Appendix 3
Outcome Measurement Hospitalisation	Yes	Appendix 3
Confounding Bias Hospitalisation	Yes	Appendix 3
Statistical Analysis Bias	Yes	Appendix 3