Retrospective observational study
267
Qianjiang central hospital of Chongqing, Chongqing three gorges central hospital and Chongqing public health medical center from January 19 to February 16, 2022
Epidemiological and clinical features of 2019-nCoV acute respiratory disease cases in Chongqing municipality China: a retrospective descriptive multiple-center study
0
COVID-19 (severe/critical)
Patient characteristics
Smoking
Not present
Present
Odds ratio
14.460 (7.030-29.750)
Yes
No