Table 3.

Geometric Means and Percentile Comparisons between SHOW and NHANES

		n	Geometric mean (95% CI)	50th (95% CI)	75th (95% CI)	90th (95% CI)	95th (95% CI)	p-trend
PFOS	SHOW	605	4.51 (4.18 – 4.87)	5.01 (4.54 – 5.49)	8.19 (7.53 – 8.85)	11.28 (10.61 – 12.43)	14.97(13.32 – 16.77)	0.54
	NHANES	1829	4.97 (4.71 – 5.25)	5.20 (4.80 – 5.40)	8.60 (8.00 – 9.40)	13.80 (12.90 – 15.40)	19.00 (16.80 – 21.50)
PFOA	SHOW	605	1.20 (1.12 – 1.27)	1.30 (1.20 – 1.40)	1.90 (1.80 – 1.90)	2.60 (2.40 – 2.90)	3.30 (2.90 – 3.50)	<0.0001
	NHANES	1829	1.59 (1.52 – 1.67)	1.60 (1.50–1.70)	2.50 (2.20–2.50)	3.40 (3.20–3.60)	4.20 (3.80–4.70)
PFNA	SHOW	605	0.45 (0.43–0.48)	0.50 (0.40 – 0.50)	0.70 (0.60 – 0.70)	1.00 (0.90 – 1.20)	1.40 (1.20 – 1.70)	<0.0001
	NHANES	1829	0.59 (0.56–0.62)	0.50 (0.40–0.50)	0.90 (0.80–0.90)	1.40 (1.20–1.40)	1.90 (1.50–2.10)
PFHxS	SHOW	605	1.14 (1.04–1.24)	1.30 (1.20 – 1.40)	2.10 (1.80 – 2.30)	3.30 (3.00 – 4.00)	4.60 (4.00 – 5.60)	0.58
	NHANES	1829	1.22 (1.15–1.29)	1.20 (1.10–1.30)	2.10 (1.90–2.20)	3.40 (3.20–3.80)	5.00 (4.10–5.80)
PFDA	SHOW	605	0.14 (0.13–0.15)	0.10 (0.10 – 0.20)	0.20 (0.20–0.20)	0.30 (0.30–0.40)	0.50 (0.40–0.60)	0.023
	NHANES	1829	0.16 (0.15–0.17)	0.10 (0.10–0.10)	0.20 (0.20–0.20)	0.40 (0.30–0.40)	0.70 (0.50–0.70)
PFHPS	SHOW	605	0.17 (0.16–0.18)	0.17 (0.16–0.19)	0.28 (0.26–0.30)	0.37 (0.35–0.40)	0.46 (0.42–0.49)	<0.0001
	NHANES	2133	0.23 (0.22–0.25)	0.19 (0.090–0.19)	0.34 (0.28–0.34)	0.60 (0.50–0.60)	0.95 (0.69–1.40)