TABLE 1.

Relative and Absolute Differences in Serum Concentrations of PFOA, PFOS, and Lipids at Baseline (2005/6) and Follow-up (2010)

	Minimum	33rd Percentile	66th Percentile	Maximum	Geometric Mean	Arithmetic Mean	SD
PFOA (ng/mL)
Baseline	1.0	44.4	118.6	2,495	74.8	140.1	208.7
Follow-up	0.25	16.3	54.2	2,140	30.8	68.2	143.9
Ratio (follow-up/baseline)	0.0004	0.36	0.51	7.86	0.41	0.49	0.49
Difference (follow-up − baseline)	−1,710	−62.9	−22.6	1,819		−71.9	149.9
PFOS (ng/mL)
Baseline	0.25	15.8	24.7	90.5	18.5	22.6	13.5
Follow-up	0.1	6.6	12.2	61	8.2	10.5	7.1
Ratio (follow-up/baseline)	0.002	0.39	0.53	7.2	0.44	0.51	0.47
Difference (follow-up − baseline)	−60.5	−13.5	−7.3	8.9		−12.1	9.3
LDL cholesterol (mg/dL)
Baseline	42	96	123	249	107.8	112.4	35.6
Follow-up	30	98.7	123	250	109.2	113.8	32.3
Ratio (follow-up/baseline)	0.26	0.94	1.1	2.98	1.02	1.05	0.26
Difference (follow-up − baseline)	−99	−7	11	116		1.9	25.0
Total cholesterol (mg/dL)
Baseline	100	178	209	324	192.5	196	36.7
Follow-up	95	177	210.7	337	192.8	196.3	37.5
Ratio (follow-up/baseline)	0.59	0.95	1.05	1.62	1	1.09	0.15
Difference (follow-up − baseline)	−116	−10	10	11		0.35	9.0
HDL cholesterol (mg/dL)
Baseline	19	43	55	117	48.6	50.5	14.5
Follow-up	16	42	55	99	47.2	49.2	14.2
Ratio (follow-up/baseline)	0.55	0.9	1.04	1.65	0.97	0.99	0.17
Difference (follow-up − baseline)	−37	−5	2	30		−1.3	28.9
Triglycerides (mg/dL)
Baseline	30	111	183.7	1,130	144.1	177.2	138.7
Follow-up	32	111.3	186.7	1,500	146.9	173.9	120.5
Ratio (follow-up/baseline)	0.14	0.85	1.25	4.93	1.02	1.15	0.62
Difference (follow-up − baseline)	−792	−23	30	561		−3.2	104.4