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

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

   5th 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
  1. ∑ 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