Effects of prone ventilation on intensive care unit mortality. Point estimates (by random-effects model) are reported separately for the groups of studies that included both acute lung injury (ALI) and acute respiratory distress syndrome patients (ARDS), those that included only ARDS patients, and the pooled overall effects of all meta-analysis-included patients. CI, confidence interval.
Abroug et al. Critical Care 2011 15:R6 doi:10.1186/cc9403