Table 2.

Absolute mean differences (ng/mL) between serum concentrations from pregnant women residing in the 7 NCS IVS counties.

	Duplin	Montgomery	Orange	Queens	Salt Lake	Waukesha
PFOA
BYLP	0.24	0.80*	0.24	0.12	0.33	0.00
Duplin	—	0.56	0.00	0.12	0.33	0.00
Montgomery	—	—	0.56	0.68*	0.89*	0.56*
Orange	—	—	—	0.12	0.33	0.00
Queens	—	—	—	—	0.21	0.12
Salt Lake	—	—	—	—	—	0.33
PFOS
BYLP	5.79*	0.48	0.70	0.33	1.09	0.29
Duplin	—	5.31	6.49*	5.46*	6.88*	6.08
Montgomery	—	—	1.18	0.15	1.57	0.77
Orange	—	—	—	1.03	0.39	0.42
Queens	—	—	—	—	1.42	0.62
Salt Lake	—	—	—	—	—	0.81
PFNA
BYLP	0.54*	0.80*	0.22	0.66*	0.05	0.17
Duplin	—	0.26	0.33*	0.11	0.50*	0.38*
Montgomery	—	—	0.58*	0.14*	0.75*	0.63*
Orange	—	—	—	0.44	0.17	0.05
Queens	—	—	—	—	0.61*	0.49
Salt Lake	—	—	—	—	—	0.12
PFHxS
BYLP	0.25*	0.27	0.31	0.66*	0.38*	0.33
Duplin	—	0.52*	0.06	0.40*	0.13	0.08
Montgomery	—	—	0.58	0.93*	0.65*	0.60*
Orange	—	—	—	0.34*	0.07	0.02
Queens	—	—	—	—	0.28*	0.32*
Salt Lake	—	—	—	—	—	0.05
PFDA
BYLP	0.23*	0.12*	0.10*	0.27*	0.02	0.06
Duplin	—	0.11	0.14*	0.04	0.21*	0.17*
Montgomery	—	—	0.03	0.15	0.10*	0.06
Orange	—	—	—	0.17	0.08	0.03
Queens	—	—	—	—	0.25*	0.21*
Salt Lake	—	—	—	—	—	0.04

Statistical significance at p < 0.05 from pairwise t-tests between county means, adjusted for multiple comparisons, are indicated with an asterisk.