Prenatal exposure to persistent organic pollutants and child overweight/obesity at 5-year follow-up: a prospective cohort study

Table 2 Wet-weight levels of maternal serum PFASs, and wet-weight and lipid-adjusted levels of maternal serum OCs, by country (n = 412)

	Norway (n = 254)		Sweden (n = 158)		p ^a	LOD	% > LOD
	Median	5th–95th perc.	Median	5th–95th perc.
Wet-weight (ng/ml)
PFOA	1.64	0.82–3.54	2.33	0.95–4.28	< 0.001	0.03	100
PFOS	9.62	3.78–24.6	16.3	7.17–30.5	< 0.001	0.03	100
PCB 153	0.46	0.26–0.83	0.68	0.37–1.10	< 0.001	0.01	100
p,p’-DDE	1.30	0.44–4.70	1.30	0.57–4.00	0.174	0.09	100
HCB	0.10	0.05–0.19	0.11	0.06–0.18	0.522	0.04	100
t-NC	0.04	0.02–0.09	0.04	0.02–0.08	0.020	0.01	100
β-HCH	0.12	0.06–0.25	0.13	0.07–0.28	0.007	0.01	99
Lipid-adjusted (ng/g lipids)
PCB 153	79.9	46.8–146	117	69.4–179	< 0.001	–	–
p,p’-DDE	211	78.0–844	244	101–662	0.101	–	–
HCB	17.0	10.7–30.1	18.4	10.3–30.9	0.261	–	–
t-NC	6.77	3.62–14.5	6.28	3.25–12.4	0.034	–	–
β-HCH	21.2	10.7–39.5	25.0	12.6–44.6	< 0.001	–	–

PFAS perfluoroalkyl substance, OC organochlorine, IQR inter-quartile range, SD standard deviation, LOD limit of detection, % > LOD percentage of serum samples above LOD, PFOA perfluorooctanoate, PFOS perfluorooctane sulfonate, PCB polychlorinated biphenyl, p,p’-DDE p,p’-dichlorodiphenyldichloroethane, HCB
^ap-values for comparison between the countries using Mann-Whitney U test

ISSN: 1476-069X