Mode of delivery and body mass index at age 5 years
| BMI category (normal BMI–base outcome) | Cases | RRR (95% CI) | P value | AdjRRR (95% CI)* | P value |
| n | |||||
| Thin | |||||
| Unassisted vaginal | 13 | Reference | Reference | ||
| Operative vaginal | 18 | 1.45 (0.69 to 3.02) | 0.324 | 1.82 (0.84 to 3.96) | 0.131 |
| Prelabour LSCS | 3 | 0.68 (0.19 to 2.44) | 0.553 | 0.46 (0.14 to 1.56) | 0.212 |
| LSCS in labour | 5 | 0.86 (0.30 to 2.47) | 0.777 | 1.06 (0.36 to 3.09) | 0.915 |
| Overweight or obese | |||||
| Unassisted vaginal | 36 | Reference | Reference | ||
| Operative vaginal | 52 | 1.51 (0.95 to 2.40) | 0.079 | 1.64 (1.00 to 2.67) | 0.05 |
| Prelabour LSCS | 17 | 1.39 (0.74 to 2.60) | 0.305 | 1.37 (0.69 to 2.69) | 0.368 |
| LSCS in labour | 26 | 1.61 (0.93 to 2.80) | 0.09 | 1.69 (0.92 to 3.08) | 0.09 |
N for adjusted model=856. Multinomial logistic regression.
*Adjusted for maternal age, education, ethnicity, marital status, infant sex, maternal smoking during pregnancy, maternal BMI at the first antenatal visit, gestational age (at delivery), birth weight and pre-eclampsia.
Adj, adjusted; BMI, body mass index; LSCS, lower segment caesarean section; RRR, relative risk ratio.