United States of America
Retrospective observational study
Registry
7162
A total of 122,653 laboratory-confirmed COVID-19 cases (Figure) and 2,112 deaths were reported to CDC. Case report forms were submitted to CDC for 74,439 (60.7%) cases
Preliminary Estimates of the Prevalence of Selected Underlying Health Conditions Among Patients with Coronavirus Disease 2019 United States, February 12 March 28, 2020 [MMWR Morb Mortal Wkly Rep]
0
COVID-19 (severe/critical)
457
COVID-19 (critical: ICU admission), comparison group: non-ICU and non-hospitalized
Patient characteristics
Smoking
none
No history of smoking
424
6479
History of smoking
33
158
Odds ratio
3.770 (2.537-5.602)
No
Yes
none, own calculation
Average