Neurodevelopmental toxicity of prenatal polychlorinated biphenyls (PCBs) by chemical structure and activity: a birth cohort study

Table 2 Distributions of maternal and cord PCBs concentration (ng/mg lipids) in two districts of eastern Slovakia, 2002-2004.

		5^th	25th	50th	75th	95th	Mean	SD
Maternal sera
∑ 4 Major PCBs^† (non-dioxin-like PCBs)	Total (n = 760)	0.159	0.280	0.414	0.659	1.583	0.590	0.663
	Michalovce (n = 559)	0.197	0.346	0.502	0.751	1.815	0.685	0.718
	Svidnik (n = 201)	0.122	0.193	0.254	0.356	0.660	0.324	0.366
∑ Dioxin-like mono-ortho PCBs^†	Total	0.005	0.012	0.021	0.036	0.093	0.032	0.047
	Michalovce	0.005	0.015	0.025	0.041	0.106	0.037	0.052
	Svidnik	0.003	0.008	0.014	0.019	0.038	0.017	0.018
∑Anti-estrogenic PCBs^†	Total	0.108	0.194	0.284	0.458	1.093	0.410	0.470
	Michalovce	0.136	0.237	0.347	0.523	1.255	0.478	0.511
	Svidnik	0.085	0.131	0.174	0.248	0.424	0.222	0.249
Cord sera
∑ 4 Major PCBs (non-dioxin-like PCBs)	Total (n = 258)	0.096	0.228	0.380	0.666	1.477	0.548	0.537
	Michalovce (n = 181)	0.177	0.332	0.493	0.807	1.584	0.682	0.584
	Svidnik (n = 77)	0.067	0.139	0.216	0.280	0.555	0.231	0.142
∑ Dioxin-like -substituted PCBs	Total	0.003	0.005	0.011	0.028	0.084	0.022	0.030
	Michalovce	0.004	0.007	0.017	0.034	0.089	0.028	0.034
	Svidnik	0.003	0.004	0.005	0.008	0.031	0.008	0.008
∑Anti-estrogenic PCBs	Total	0.062	0.154	0.246	0.441	0.985	0.372	0.384
	Michalovce	0.120	0.225	0.343	0.547	1.053	0.465	0.421
	Svidnik	0.043	0.085	0.145	0.188	0.375	0.152	0.097

^† ∑ 4 major PCBs (non-dioxin-like PCBs), sum of PCB #138, #153, #170 and #180; ∑ Dioxin-like PCBs, sum of PCB #118, and #156; ∑ Anti-estrogenic PCBs, sum of PCB #138, #156, #170, and #180

ISSN: 1476-069X