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. Author manuscript; available in PMC: 2017 Aug 1.

Published in final edited form as: Environ Res. 2016 May 11;149:239–246. doi: 10.1016/j.envres.2016.04.034

Table 2.

Median serum concentrations of perfluoroalkyl substances (PFAS) among all women and stratified by duration of any breastfeeding

		Median (25^th–75^th)
	n	PFOA (ng/mL)	PFOS (ng/mL)	PFNA (ng/mL)	PFHxS (ng/mL)
All women	336	5.5 (3.8–7.7)	13.9 (9.6–18.2)	0.9(0.7–1.2)	1.5 (0.9–2.3)
Any breastfeeding (months)
0	63	5.5 (4.4–7.2)	12.8 (8.9–17.2)	0.9 (0.7–1.2)	1.3 (0.8–2.2)
>0 and <3	85	6.7 (4.7–9.0)	15.4 (12.3–19.7)	1.0 (0.7–1.2)	1.5 (1.0–2.6)
≥3 and <6	44	5.8 (4.1–7.3)	13.3 (10.0–19.6)	1.0 (0.7–1.4)	1.6 (1.0–2.8)
≥6 and <12	61	5.5 (3.7–8.4)	13.3 (9.0–18.1)	1.0 (0.8–1.2)	1.3 (0.9–2.2)
≥12	83	4.4 (3.1–6.4)	12.9 (9.5–16.8)	0.9 (0.7–1.1)	1.6 (0.9–2.2)