Table 3.

Adjusted average difference ($\mathrm{\beta }$) in adiposity marker in offspring at 3 and 18 months of age (pooled data) for 1-unit (ng/mL) increase in maternal pregnancy serum PFAA concentration stratified according to sex obtained from random mixed effects linear regression models.

Compound (ng/mL)	BMI SDS			Ponderal index SDS			Waist circumference SDS
	Girls ($n=275$)	Boys ($n=318$)		Girls ($n=275$)	Boys ($n=318$)		Girls ($n=274$)	Boys ($n=315$)
	$\mathrm{\beta }$ (95% CI)	$\mathrm{\beta }$ (95% CI)	$p_{\text{int}}$a	$\mathrm{\beta }$ (95% CI)	$\mathrm{\beta }$ (95% CI)	$p_{\text{int}}$a	$\mathrm{\beta }$ (95% CI)	$\mathrm{\beta }$ (95% CI)	$p_{\text{int}}$a
PFHxS
Adjustedb	0.03 ($-0.19$, 0.24)	0.13 ($-0.34$, 0.60)	0.70	0.02 ($-0.14$, 0.82)	0.34 ($-0.14$, 0.82)	0.24	0.02 ($-0.19$, 0.22)	$-0.05$ ($-0.49$, 0.39)	0.80
PFOS
Adjustedb	$-0.01$ ($-0.04$, 0.02)	$-0.004$ ($-0.03$, 0.02)	0.84	$-0.01$ ($-0.04$, 0.02)	$-0.001$ ($-0.03$, 0.03)	0.64	$-0.01$ ($-0.04$, 0.01)	$-0.01$ ($-0.03$, 0.02)	0.80
PFOA
Adjustedb	0.06 ($-0.02$, 0.14)	0.03 ($-0.04$, 0.11)	0.67	0.09 (0.004, 0.17)	0.06 ($-0.02$, 0.13)	0.58	$-0.01$ ($-0.09$, 0.07)	0.03 ($-0.04$, 0.11)	0.40
PFNA
Adjustedb	0.26 (0.03, 0.49)	0.10 ($-0.12$, 0.33)	0.33	0.36 (0.13, 0.59)	0.13 ($-0.10$, 0.36)	0.16	0.14 ($-0.08$, 0.35)	0.04 ($-0.17$, 0.25)	0.52
PFDA
Adjustedb	0.58 ($-0.03$, 1.19)	0.24 ($-0.31$, 0.80)	0.42	1.02 (0.40, 1.64)	0.25 ($-0.32$, 0.82)	0.07	0.07 ($-0.50$, 0.65)	0.13 ($-0.38$, 0.64)	0.89

Note: BMI, body mass index; CI, confidence interval; PFDA, perfluorodecanoic acid; PFHxS, perfluorohexane sulfonic acid; PFNA, perfluorononanoic acid; PFOA, perfluorooctanoic acid; PFOS, perfluorooctane sulfonic acid; SDS, standard deviation scores.

^aInteraction between the compound and sex, tested with the likelihood-ratio test.

^bAdjusted for maternal age, parity, prepregnancy BMI, prepregnancy ${\text{BMI}}^2$, educational level, smoking, visit, and adiposity marker at birth.