Figure 2
From: Arterial hyperoxia and mortality in critically ill patients: a systematic review and meta-analysis
Forest plot showing individual odds ratios for mortality of studies on general populations of mechanically ventilated ICU patients (k = 4). Odds ratios >1 (right side of the plot) indicate an association between hyperoxia and higher mortality. Heterogeneity was Q (3) 91.85, P <0.001; I 2 = 96.73. The size of the boxes is inversely proportional to the size of the result study variance, so that more precise studies have larger boxes. k, number of studies; ES, effect size; CI, confidence interval; Sig., P value.