Association of Max PaCO2 and outcomes persisted after adjustment ( per 10mmHg increase : sIVH/death : OR 1.27 ( 1.13 to 1.41 ) ; BPD/death : OR 1.27 ( 1.12 to 1.44 ) ; NDI/death : OR 1.23 ( 1.10 to 1.38 ) , death : OR 1.27 ( 1.12 to 1.44 ) , all p < 0.001 ) .