Table 5.

Spearman rank correlations of PCBs (lipid adj.) and thyroid function of mothers and newborns at different BMI groups, in the EHF-Assaf-Harofeh-Ichilov birth cohort, Israel, 2013–2015, grouped by maternal pre-pregnancy BMI.

		Maternal TSH	Maternal FT4	Maternal	Maternal	NB T4
				Tg Ab	TPO Ab
BMI <19 ( N = 24)
PCB 118 (ng/g lipids)	r	0.412	0.287	0.341	0.477	−0.237
	p	0.045#	0.175	0.103	0.018#	0.265
PCB 138 (ng/g lipids)	r	0.501	0.358	0.191	0.437	−0.139
	p	0.013#	0.086	0.370	0.033#	0.517
PCB 153 (ng/g lipids)	r	0.518	0.305	0.178	0.401	−0.177
	p	0.010#	0.147	0.406	0.052	0.408
PCB 180 (ng/g lipids)	r	0.445	0.160	0.048	0.277	−0.215
	p	0.030#	0.454	0.823	0.191	0.313
Sum PCBs (ng/g lipids)	r	0.511	0.262	0.150	0.376	−0.141
	p	0.011#	0.216	0.483	0.070	0.510
BMI 19–25 ( N = 88)
PCB 118 (ng/g lipids)	r	0.033	−0.019	−0.066	−0.208	0.160
	p	0.760	0.860	0.542	0.052	0.136
PCB 138 (ng/g lipids)	r	0.002	−0.038	0.048	−0.057	0.192
	p	0.984	0.724	0.654	0.596	0.073
PCB 153 (ng/g lipids)	r	−0.025	0.009	0.098	−0.022	0.147
	p	0.820	0.934	0.363	0.842	0.170
PCB 180 (ng/g lipids)	r	−0.019	0.034	0.112	−0.021	0.076
	p	0.858	0.752	0.298	0.849	0.483
Sum PCBs (ng/g lipids)	r	−0.009	0.009	0.073	−0.052	0.146
	p	0.933	0.936	0.496	0.629	0.176
BMI ≥ 25 ( N = 45)
PCB 118 (ng/g lipids)	r	−0.224	0.079	0.134	0.179	0.275
	p	0.139	0.607	0.380	0.240	0.068
PCB 138 (ng/g lipids)	r	−0.255	0.010	0.139	0.177	0.148
	p	0.091	0.947	0.361	0.245	0.331
PCB 153 (ng/g lipids)	r	−0.265	0.039	0.088	0.116	0.182
	p	0.079	0.800	0.567	0.449	0.232
PCB 180 (ng/g lipids)	r	−0.290	0.048	0.052	0.085	0.157
	p	0.053	0.754	0.732	0.579	0.302
Sum PCBs (ng/g lipids)	r	−0.276	0.051	0.095	0.126	0.192
	p	0.066	0.738	0.535	0.411	0.206

r, Spearman's rho.

p, p-value.

^#p < 0.05.

TSH, Thyroid-stimulating hormone; FT4, Free Thyroxine; Tg Ab, Thyroglobulin autoantibodies; TPO Ab, Thyroid peroxidase antibodies; NB T4, newborn total thyroxine; PCB, polychlorinated biphenyl.

Bold: p-value < 0.05.