Table 2.

Serum PFAS concentrations in WTCHR and comparison groups.

		Comparison (n = 169)		WTCHR (n = 118)		p-value
	% < LOD	Mean (SD)	Median (min, max; IQR)	Mean (SD)	Median (min, max; IQR)	Wilcoxon
Serum perfluoroalkyl substances (PFASs) (ng/mL)
PFHxS	0	0.73 (0.75)	0.53 (0.09, 5.26; 0.43)	1.28 (2.00)	0.67 (0.19, 15.5; 0.68)	0.0002*
PFOS	0	3.45 (3.30)	2.75 (0.60, 27.8; 2.20)	4.26 (2.51)	3.72 (1.01, 14.2; 2.82)	< 0.0001*
PFOA	0	1.53 (0.65)	1.38 (0.36, 4.28; 0.69)	1.91 (0.80)	1.80 (0.56, 5.03; 0.90)	< 0.0001*
PFNA	0	0.56 (0.30)	0.49 (0.15, 2.40; 0.33)	0.67 (0.30)	0.61 (0.16, 1.97; 0.36)	< 0.0001*
PFDA	24.0	0.13 (0.13)	0.11 (0.01, 0.87; 0.15)	0.17 (0.12)	0.14 (0.01, 0.70; 0.12)	< 0.0001*
PFUnDA	44.3	0.10 (0.13)	0.01 (0.01, 0.85; 0.15)	0.15 (0.15)	0.12 (0.01, 0.76; 0.21)	< 0.0001*
Total PFAS	-	6.50 (4.00)	5.66 (1.39, 31.1; 3.45)	8.44 (4.39)	7.26 (2.15, 27.0; 5.25)	< 0.0001*

LODs: PFHxS, PFNA, PFDA, PFUnDA = 0.02 ng/mL; PFOS = 0.03 ng/mL; PFOA = 0.05 ng/mL.

^*Significant at the p < 0.05 level.