Fig. 2From: Prevalence and impact of acute renal impairment on COVID-19: a systematic review and meta-analysisMeta-analysis of the proportion of COVID-19 patients with elevation of serum creatinine and BUN. Heterogeneity is defined based on the calculated I2 index, and random effect models are used to calculate the weights. The forest plots represent proportion of patients with elevation of serum creatinine and BUN (a, b)Back to article page