Fig. 6
Risk factors of death by Middle East respiratory syndrome (MERS) by study design. Panels show the risk estimates by covariate: (a) sex, (b): heart disease and (c): renal disease). Odds ratio (OR) represents the odds ratio of death among men with underlying medical condition compared with women without comorbidities, respectively. The size of the diamonds reflects the sample size, and the whiskers extend to the lower and upper values of the 95% confidence interval (CI). The diamond without fill represents the pooled estimate using the inverse variance of the risk of death. I2 measures the extent of heterogeneity, representing the proportion of variance in a meta-analysis that is attributable to study heterogeneity