. Author manuscript; available in PMC: 2022 Jan 21.

Published in final edited form as: J Expo Sci Environ Epidemiol. 2021 Apr 6;32(1):27–36. doi: 10.1038/s41370-021-00322-8

Table 2.

Distribution of second trimester plasma levels of corticotropin releasing hormone (pg/mL) and second trimester serum levels of per- and poly-fluoroalkyl substances (ng/mL) (N=497).

	% Above MDL	% Machine Readable	Geometric Mean (Geometric SD)	Percentile
	% Above MDL	% Machine Readable	Geometric Mean (Geometric SD)	5^th	25^th	50^th	75^th	95^th
CRH	100.00	100.00	30.10 (2.19)	8.62	17.77	32.56	50.73	99.21

PFNA	98.79	99.60	0.30 (1.92)	0.10	0.20	0.30	0.43	0.85
PFOA	99.80	100.00	0.73 (1.97)	0.25	0.46	0.76	1.12	2.11
PFHxS	100.00	100.00	0.36 (2.26)	0.11	0.20	0.32	0.58	1.49
PFOS	100.00	100.00	1.86 (2.07)	0.51	1.18	1.92	3.11	6.00
Me-PFOSA-AcOH	98.79	99.80	0.05 (2.07)	0.02	0.03	0.05	0.08	0.18

Abbreviations: SD, standard deviation; MDL, method detection limit. Median and percentile values were calculated with PFAS concentrations below the MDL coded as missing.