Table 4 Correlations between maternal PFASs and maternal thyroid hormones.

Maternal PFASs	Maternal FT3		Maternal FT4		Maternal T3		Maternal T4		Maternal TSH
Maternal PFASs	Not-adjusted	Adjusted^a	Not-adjusted	Adjusted^a	Not-adjusted	Adjusted^a	Not-adjusted	Adjusted^a	Not-adjusted	Adjusted^a
PFOA	0.054	0.024	−0.013*	0.000	0.114	0.102	0.083	0.062	−0.162**	−0.124
PFNA	−0.048**	−0.063	−0.085**	−0.072	−0.021*	−0.018	0.010*	−0.006	−0.180**	−0.170*
PFDA	−0.060**	−0.087	−0.077**	−0.086	−0.075**	−0.079	0.019*	−0.010	−0.218**	−0.216**
PFUnA	−0.119**	−0.121	−0.061**	−0.062	−0.109**	−0.097	0.044*	0.030	−0.184**	−0.202*
PFDoA	−0.262**	−0.268**	−0.120**	−0.160*	−0.292**	−0.301**	−0.114**	−0.160*	−0.197**	−0.231**
PFHxS	0.119	0.124	0.047	0.038	0.072	0.084	0.108	0.084	−0.149*	−0.154
PFOS	0.012*	0.025	−0.041**	−0.057	−0.019*	0.008	0.050*	0.021	−0.236**	−0.261**
6:2 FTS	0.187	0.160*	0.139	0.164*	0.216*	0.205*	0.183	0.172*	−0.067	−0.013
NMeFOSAA	0.152	0.163*	0.037	0.081	−0.039*	−0.028	0.024	0.072	−0.009*	−0.046

Spearman correlation tests were used among the concentrations of PFASs and thyroid hormones with- and without adjustment influential covariates, which were selected from multivariate models. Four women with abnormal thyroid hormones levels were excluded. Units in pg/mL for 6:2 FTS and NMeFOSAA, ng/mL for other PFASs, pmol/mL for FT3 and FT4, nmol/mL for T3 and T4, μIU/mL for TSH. ^aAdjusted for maternal age, maternal prepregnancy BMI, maternal monthly income, and neonatal type of delivery. * P < 0.05, ** P < 0.01.

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