Table 2.

PFAS serum measurements by site for the girls in the study, Greater Cincinnati and San Francisco Bay Area, 2004–2014.

PFAS (ng/mL)	$N$	Median	Minimum	Maximum	LODa	Percentage $<\text{LOD}$ (%)
Both sites combined ($n=704$)
PFOA	704	6.40	$<\text{LOD}$	55.90	0.1	0.14
PFOS	704	13.10	$<\text{LOD}$	104.00	0.2	0.14
PFNA	704	1.50	$<\text{LOD}$	15.50	0.1	0.14
PFHxS	704	3.50	$<\text{LOD}$	192.00	0.1	0.14
PFDeA	641	0.30	$<\text{LOD}$	1.20	0.1 and 0.2	22.62
Me-PFOSA-AcOH	704	0.70	$<\text{LOD}$	14.65	0.2	4.4
Et-PFOSA-AcOH	704	0.14	$<\text{LOD}$	3.10	0.1 and 0.2	85.37
PFOSA	704	0.07	$<\text{LOD}$	1.60	0.05 and 0.1	85.51
Greater Cincinnati ($n=353$)
PFOA	353	7.30	$<\text{LOD}$	55.90	0.1	0.28
PFOS	353	13.60	$<\text{LOD}$	96.00	0.2	0.28
PFNA	353	1.40	$<\text{LOD}$	6.80	0.1	0.28
PFHxS	353	5.20	$<\text{LOD}$	185.00	0.1	0.28
PFDeA	293	0.30	$<\text{LOD}$	1.00	0.1 and 0.2	24.23
Me-PFOSA-AcOH	353	0.70	$<\text{LOD}$	8.11	0.2	5.10
Et-PFOSA-AcOH	353	0.14	$<\text{LOD}$	1.20	0.1 and 0.2	85.55
PFOSA	353	0.07	$<\text{LOD}$	0.70	0.05 and 0.1	81.02
San Francisco Bay Area ($n=351$)
PFOA	351	5.80	2.4	18.20	NA	0
PFOS	351	12.50	3.8	104.00	NA	0
PFNA	351	1.60	0.6	15.50	NA	0
PFHxS	351	2.30	0.3	192.00	NA	0
PFDeA	348	0.30	$<\text{LOD}$	1.20	0.2	21.26
Me-PFOSA-AcOH	351	0.61	$<\text{LOD}$	14.65	0.2	3.70
Et-PFOSA-AcOH	351	0.14	$<\text{LOD}$	3.10	0.2	85.19
PFOSA	351	0.07	$<\text{LOD}$	1.60	0.05 and 0.1	90.03

Note: Summary statistics were determined by using the univariate procedure in SAS. CDC, Centers for Disease Control and Prevention; Et-PFOSA-AcOH, $2\text{-}\left(N\text{-ethyl-perfluorooctane sulfonamido}\right)$ acetic acid; LOD, limit of detection reported by CDC lab; Me-PFOSA-AcOH, $2\text{-}\left(N\text{-methyl-perfluorooctane sulfonamido}\right)$ acetic acid; NA, not available; PFAS, per- and polyfluoroalkyl substances; PFDeA, perfluorodecanoic acid; PFHxS, perfluorohexane sulfonate; PFNA, perfluorononanoic acid; PFOA, perfluorooctanoic acid; PFOS, perflurooctanesulfonic acid; PFOSA, perfluorooctane sulfonaminde.

^a Samples were sent to the CDC lab in several batches. LODs of the PFAS were batch specific.