Fig. 1From: Effects of permissive hypercapnia on pulmonary and neurodevelopmental sequelae in extremely low birth weight infants: a meta-analysisForest plot of the BPD in extremely low birth weight infants who received permissive hypercapnia to controls. CI confidence interval, df degrees of freedom, PHC permissive hypercapnia, M–H Mantel–HaenszelBack to article page