Table 2.

Distribution of POPs in maternal serum during pregnancy in the Early Autism Risk Longitudinal Investigation (EARLI) study

Congener	%above LOD	Mean ± SD	Median (IQR)
PCBs
PCB 28	79	3.3 ± 3.8	1.8 (0.9 – 4.4)
PCB 74	83	1.7 ± 1.4	1.3 (0.9 – 2.2)
PCB 99	84	1.6 ± 1.2	1.3 (0.8 – 2.0)
PCB 118	98	2.9 ± 2.1	2.2 (1.4 – 3.7)
PCB 153	100	7.0 ± 5.1	5.6 (3.6 – 8.7)
PCB 138/158	100	5.6 ± 4.1	4.6 (2.9 – 7.0)
PCB 170	93	2.0 ± 1.3	1.6 (1.0 – 2.5)
PCB 180	100	4.8 ± 3.2	3.9 (2.6 – 6.1)
PCB 187	80	1.7 ± 1.6	1.2 (0.8 – 2.3)
PCB 196/203	77	1.3 ± 0.8	1.1 (0.7 – 1.7)
PBDEs
PBDE 47	100	22.4 ± 35.5	12.0 (5.9 – 19.2)
PBDE 99	82	4.9 ± 9.0	2.1 (1.0 – 3.7)
PBDE 100	94	5.2 ± 7.3	2.7 (1.5 – 5.8)
153PBDE 153	99	12.2 ± 17.5	6.2 (2.9 – 13.0)
Persistent Pesticides
HCB	97	8.0 ± 3.4	7.6 (6.0 – 9.3)
p,p’ DDE	100	180.6 ± 463.5	78.3 (53.0 – 131.4)

Concentrations are lipid adjusted and presented in ng/g lipids. Sample size=154