Table 3

The association between caesarean delivery and obesity at age 3, stratified by maternal prepregnancy BMI and birth weight

Odds of overweightOdds of obesity
Mode of deliveryOR (95% CI)
OverallVaginal1.00 (ref)1.00 (ref)
Caesarean1.24 (0.86 to 1.77)2.10 (1.36 to 3.23)
Maternal BMI<25 kg/m2 (n=811)Vaginal1.00 (ref)1.00 (ref)
Caesarean1.12 (0.69 to 1.83)2.97 (1.58 to 5.60)
Maternal BMI≥25 kg/m2 (n=440)Vaginal1.00 (ref)1.00 (ref)
Caesarean1.44 (0.83 to 2.49)1.61 (0.88 to 2.96)
Birth weight<3.5 kg (n=629)Vaginal1.00 (ref)1.00 (ref)
Caesarean1.15 (0.66 to 2.02)2.29 (1.13 to 4.63)
Birth weight≥3.5 kg (n=626)Vaginal1.00 (ref)1.00 (ref)
Caesarean1.28 (0.80 to 2.06)2.05 (1.17 to 3.58)
  • We ran separate multinomial logistic regression models within each stratum. Models were adjusted for maternal age, education, race/ethnicity, and child age and sex, maternal prepregnancy body mass index (BMI) and birth weight.