Table 3.

Pre‐pregnancy BMI, a potential effect modifier in the association between vaginal infections in the third trimester and overweight/obesity at age 4 in NINFEA children born with vaginal delivery

	RRRs (95% CI) for each stratum of pre‐pregnancy BMI and vaginal infection status with a single reference category				RRRs (95% CI) for vaginal infection in the strata of pre‐pregnancy BMI
	Vaginal infection = 0		Vaginal infection = 1
Pre‐pregnancy BMI	N	RRR (95% CI)	N	RRR (95% CI)
≤25	208/234	1.00	26/234	1.34 (0.86‐2.08)	1.33 (0.86‐2.07)
>25	71/94	1.64 (1.22‐2.22)	23/94	7.5 (4.01‐13.97)	4.78 (2.45‐9.35)

Note: All RRRs are adjusted for maternal age, education, parity, pre‐pregnancy BMI, smoking during pregnancy, gestational diabetes and gestational age.

Abbreviations: BMI, body mass index; RRR, relative risk ratios.