. Author manuscript; available in PMC: 2020 Aug 6.

Published in final edited form as: Environ Sci Technol. 2019 Jul 10;53(15):9203–9213. doi: 10.1021/acs.est.9b02226

Table 3.

Exponentiated beta (β) coefficients are shown for the multivariate linear models of log₁₀-transformed OPE and thyroid hormone concentrations. The model was constructed using a stepwise variable selection procedure based on Akaike information criterion optimization.

Model	TNBP		TNEP		TCEP		TCIPP		TDCIPP		TPHP
Hormone	10^β (95% CI)	p	10^β (95% CI)	p	10^β (95% CI)	p	10^β (95% CI)	p	10^β (95% CI)	p	10^β (95% CI)	p
fT₄ (ng/dL)
Model A	1.07 (0.982,1.17)	0.116	0.954 (0.872,1.05)	0.309	1.00 (0.896,1.12)	0.976	1.01 (0.885,1.15)	0.877	0.958 (0.683,1.34)	0.801	0.926 (0.706,1.21)	0.571
Model B	0.996 (0.933,1.06)	0.909	0.969 (0.909,1.03)	0.329	1.03 (0.952,1.11)	0.458	0.897 (0.817,0.986)	0.026	1.10 (0.869,1.39)	0.418	1.21 (0.999,1.47)	0.052
Model C	1.04 (0.945,1.14)	0.422	1.00 (0.929,1.08)	0.949	0.990 (0.927,1.06)	0.763	0.806 (0.738,0.881)	<0.001	1.38 (1.15,1.66)	0.001	1.27 (1.04,1.56)	0.020
TT₄ (ug/dL)
Model A	1.12 (0.910,1.37)	0.283	0.954 (0.776,1.17)	0.645	1.11 (0.859,1.43)	0.422	1.12 (0.831,1.52)	0.437	1.26 (0.583,2.72)	0.550	0.809 (0.436,1.50)	0.491
Model B	1.03 (0.846,1.25)	0.784	0.994 (0.823,1.20)	0.953	1.13 (0.901,1.43)	0.277	1.03 (0.780,1.37)	0.817	1.36 (0.675,2.74)	0.381	0.974 (0.549,1.73)	0.928
Model C	1.04 (0.861,1.25)	0.678	0.891 (0.764,1.04)	0.132	1.25 (1.10,1.43)	0.001	0.853 (0.715,1.02)	0.076	1.70 (1.18,2.46)	0.006	1.22 (0.816,1.82)	0.323
TT₃ (ng/dL)
Model A	1.56 (0.869,2.79)	0.133	0.725 (0.402,1.31)	0.276	1.32 (0.643,2.73)	0.437	1.98 (0.836,4.69)	0.117	2.46 (0.274,22.2)	0.411	0.429 (0.074,2.50)	0.338
Model B	1.27 (0.717,2.23)	0.407	0.804 (0.461,1.40)	0.431	1.40 (0.715,2.76)	0.315	1.60 (0.706,3.64)	0.252	2.99 (0.384,23.2)	0.287	0.682 (0.127,3.67)	0.648
Model C	0.876 (0.499,1.54)	0.636	0.784 (0.496,1.24)	0.286	2.10 (1.41,3.12)	<0.001	0.961 (0.567,1.63)	0.879	2.59 (0.859,7.80)	0.089	1.72 (0.516,5.74)	0.366

^{Bold *:}

p<0.05

Model A: no covariates

Model B: cholesterol as covariate

Model C: all covariates – cholesterol, age, breed, sampling season, years in current residence, year adopted, location, time spent outdoors, and weight