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Table 2 Relationship between PCB, DDE, and potential confounders

From: Maternal concentration of polychlorinated biphenyls and dichlorodiphenyl dichlorethylene and birth weight in Michigan fish eaters: a cohort study

  Exposure category n Boys (%) Parity at before delivery (mean) Gestational age (mean) Maternal age at delivery (mean) Maternal Height (mean) Maternal education (%) Maternal smoking during pregnancy (%) Child birth year (%)
         High school College College and higher   69-<73 73-< 83 > 83
Maternal DDE (μg / L) < 5 46 39.1 0.9 39.8 27.6 163.4 34.8 32.6 32.6 2.2 17.4 58.7 23.9
  5 -< 15 89 48.3 1.0 39.9 28.0 163.9 45.0 15.7 39.3 15.7 24.7 62.9 12.4
  15 -< 25 25 56.0 1.3 40.2 27.6 165.6 44.0 44.0 12.0 20.0 60.0 40.0 0
  ≥ 25 8 62.5 0.9 40.5 29.0 166.4 50.0 50.0 0 25.0 37.5 62.5 0
Maternal PCB (μg / L) < 5 84 45.2 1.0 40.1 28.0 163.6 32.2 33.3 34.5 13.1 16.7 61.9 21.4
  5 -< 15 66 48.5 0.9 39.9 27.9 163.9 51.5 13.6 34.9 16.7 30.3 63.6 6.1
  15 -< 25 11 36.4 1.3 39.6 27.3 166.3 72.7 27.3 0 0 63.6 36.4 0
  ≥ 25 7 85.7 1.9 40.0 27.9 169.1 28.6 57.1 14.3 0 100 0 0