The inclusion criteria in this meta-analysis were as follows: (1) subjects in each study were patients with coronavirus infection; (2) the patients were divided into the experimental group using corticosteroids and the control group not using corticosteroids; (3) the outcomes included the use of corticosteroids in critical and non-critical patients, mortality, length of stay (LOS) and adverse reactions to corticosteroids.
Exclusion criteria: (1) the same patients were enrolled in different articles; (2) commentaries, editorials, case reports, letters and family-based studies; and (3) patients in studies were under 18?years old.