Table 3:

Attributable body weight difference from birth to 5 years of age in children unexposed to intrapartum antibiotics (None), children exposed to intrapartum antibiotic prophylaxis as recommended for the prevention of perinatal group B streptococcal disease (GBS) and any other type or duration of intrapartum antibiotic administration (Other) stratified by delivery mode.

	Vaginal delivery			Cesarean delivery
	None (weight gain, kg)	GBS (Δ weight gain, kg)	Other (Δ weight gain, kg)	Other (weight gain, kg)	GBS (Δ weight gain, kg)
Total cohort, N	113693	31263	11425	58684	8366
	Reference			Reference
Crude model	16.08	0.30 (0.29, 0.30)	0.12 (0.10, 0.13)	16.47	0.38 (0.36, 0.39)
Full Model	16.00	0.32 (0.31, 0.33)	0.16 (0.15, 0.18)	16.21	0.43 (0.41, 0.45)

Using the Full Model (Covariates through childhood) adjustment for demographics, maternal and birth-related factors included infant sex, gestational age at birth, birth weight, infant’s race/ethnicity (White, Black, Hispanic, Asian or Pacific Islander, other or unknown), year of birth, medical center of birth, maternal education, parity, maternal diabetes, maternal pre-pregnancy BMI, maternal gestational weight gain, maternal smoking during pregnancy, antepartum antibiotic exposure, neonatal antibiotic exposure, breastfeeding, indirect antibiotic exposure during breastfeeding, and childhood antibiotic exposure.