The intervention group also had a reduction in major neonatal morbidity as compared with the control group ( adjusted risk difference , -0.7 % ; 95 % CI , -1.3 to -0.1 ; P = 0.03 ) and a smaller increase in minor neonatal morbidity ( adjusted risk difference , -1.7 % ; 95 % CI , -2.6 to -0.9 ; P < 0.001 ) .