In modified intent-to-treat analyses that excluded women with miscarriages ( n = 6 ) , gestational diabetes ( n = 32 ) , or subsequent pregnancies ( n = 32 ) , the intervention had no significant effect on the odds of achieving prepregnancy weight at 12 mo postpartum ( n = 331 ; 35.4 % compared with 28.1 % ; P = 0.18 ) .