Busetto 2020.

Study characteristics
Notes	English title Obesity and COVID‐19: an Italian snapshot Study setting Start of study recruitment (MM/YYYY): 03/2020 End of study recruitment (MM/YYYY): 04/2020 Study design: Retrospective cohort Study centre(s): Single centre/clinic/area within a country Number of centres, clinics or areas: 1 Study setting: Inpatient Number of participants recruited: 92 Sampling method: Consecutive participants Participants Female participants (absolute number): 35 Age measure, value: Mean (SD), 70.5 (13.3) Inclusion criteria: Being positive to an oropharyngeal swab used for real‐time reverse‐transcriptase polymerase chain reaction assays specific for SARS‐CoV‐2 Exclusion criteria: NR Smoking frequency: NR Diabetes frequency: 28 Hypertension frequency: 59 Cardiovascular disease frequency: 29 Asthma frequency: NR Chronic obstructive pulmonary disease frequency: NR Other pulmonary disease frequency: 12 (chronic respiratory diseases) Immunosuppression frequency: NR Chronic kidney disease frequency: 5 Cancer frequency: 12 Steroid administration frequency: NR Supplemental oxygen administration frequency: 58 Other treatments (frequency): NR Prognostic factor(s) Study’s definition for obesity: BMI > 25 The time when obesity has been measured: Some time after presentation Main variable used for determination of obesity: BMI Threshold used for definition: 25 Obesity frequency (absolute number): 60 Prognostic factor(s): Obesity (BMI > 25) Outcome(s) Mortality Outcome (prognostic factor) Mortality (obesity (BMI > 25)) Follow‐up Number of patients followed completely for the outcome: 92 Number of obese patients followed completely for the outcome: 32 Number of non‐obese patients followed completely for the outcome: 60 Univariable unadjusted analysis for obesity Effect measure for obesity: NR Effect measure value (95% CI), P value: NR Multivariable analysis for obesity Modelling method: Logistic regression The set of prognostic factors used for adjustment: Age, sex Effect measure for obesity: Odds ratio Effect measure value (95% CI), P value: 0.27 (0.03, 2.05), 0.204
Item	Authors' judgement	Support for judgement
Study Participation	Yes	Appendix 3
Study Attrition Mortality	Yes	Appendix 3
Prognostic Factor Measurement	Yes	Appendix 3
Outcome Measurement Mortality	Yes	Appendix 3
Confounding Bias Mortality	Yes	Appendix 3
Statistical Analysis Bias	Unclear	Appendix 3