Association between Perfluoroalkyl substances and thyroid stimulating hormone among pregnant women: a cross-sectional study

Table 2 Distributions of plasma concentrations of PFASs (ng/mL) and TSH (μIU/mL)

PFASs^*	% > LOQ	Geometric mean (95% CI)	25^thpercentile	Median	75^thpercentile	Maximum
PFDA	69	0.09 (0.08, 0.09)	0.04	0.09	0.15	1.77
PFHpS	88	0.12 (0.11, 0.12)	0.08	0.13	0.18	0.97
PFHxS	99	0.62 (0.59, 0.64)	0.43	0.60	0.84	21.74
PFNA	99	0.37 (0.36, 0.39)	0.28	0.39	0.51	3.01
PFOA	100	2.13 (2.07, 2.20)	1.57	2.15	2.95	13.99
PFOS	100	12.77 (12.45, 13.10)	10.13	12.81	16.49	104.18
PFUnDA	94	0.20 (0.19, 0.21)	0.14	0.22	0.32	1.17
TSH	100	3.39 (3.25, 3.49)	2.44	3.52	4.81	18.64

* N = 903. For values of PFASs below LOQ, LOQs divided by square root of 2 were imputed and used in the calculations of statistics (PROC SURVEYMEANS).

ISSN: 1476-069X