Significant reductions were seen in pneumothorax ( 5 of 105 intervention group infants [ 4.8 % ] vs 13 of 103 12.6 % ] ; P = .04 ) and severe intraventricular hemorrhage ( 11 infants [ 10.3 % ] vs 23 [ 22.1 % ] ; P = .02 ) , and the combined survival without severe adverse events was increased in the intervention group ( 54 infants [ 50.5 % ] vs 37 [ 35.6 % ] ; P = .02 ; absolute risk reduction , 14.9 ; 95 % CI , 1.4 to 28.2 ) .