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Fig. 4 | BMC Public Health

Fig. 4

From: Clinical determinants of the severity of Middle East respiratory syndrome (MERS): a systematic review and meta-analysis

Fig. 4

Estimated risks associated with Middle East respiratory syndrome (MERS) by study design. Panels show the risk estimates by study outcome: (a) risk of death, (b) risk of admission to intensive care unit (ICU) and (c) risk of mechanical ventilation. CFR represents the case fatality risk. The estimate for each study design represents the pooled risk of death calculated using the inverse variance of the risk of death in each published study. 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 the heterogeneity, representing the proportion of variance in a meta-analysis that is attributable to study heterogeneity

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