Fig. 4

Forest plots comparing of the proportion of patients with elevated creatinine kinase levels in the severe disease/ICU group and in the non-severe disease/non-ICU group (a), the creatinine kinase levels in the severe disease/ICU group and in the non-severe disease/non-ICU group (b), and the proportion of patients with elevated creatinine kinase–myocardial band levels in the severe disease/ICU group and in the non-severe disease/non-ICU group (c). ICU, intensive care unit; RR, risk ratios; SMD, standard mean