The incidence of bronchopulmonary dysplasia was 27.8 % in the budesonide group versus 38.0 % in the placebo group ( relative risk , stratified according to gestational age , 0.74 ; 95 % CI , 0.60 to 0.91 ; P = 0.004 ) ; death occurred in 16.9 % and 13.6 % of the patients , respectively ( relative risk , stratified according to gestational age , 1.24 ; 95 % CI , 0.91 to 1.69 ; P = 0.17 ) .