Table 1

Plasma levels of DDE and total PCBs among cases and controls in the CBCS

CasesControlsPa
Mean (SD)MedianMean (SD)Median
African-Americansn = 292n = 270
DDEb9.96 (11.1)6.648.82 (8.9)5.660.45
Lipid-adjusted DDEc1.96 (2.2)1.311.69 (1.7)1.170.29
Total PCBsd2.79 (2.2)2.172.56 (2.3)1.970.21
Lipid-adjusted total PCBse0.56 (0.4)0.450.51 (0.4)0.430.08
Whitesn = 456n = 389
DDE3.52 (4.4)1.913.94 (5.8)2.320.09
Lipid-adjusted DDE0.66 (0.8)0.400.76 (1.2)0.430.18
Total PCBs1.89 (1.7)1.471.89 (1.2)1.630.16
Lipid-adjusted total PCBs0.38 (0.2)0.330.38 (0.2)0.350.42
  • a Wilcoxon rank sum test comparing medians in cases and controls.

  • b p,p′-DDE in parts per billion (ng/ml), unadjusted for lipids.

  • c p,p′-DDE adjusted for lipids (μg/g).

  • d Total PCBs in ppb (ng/ml), unadjusted for lipids.

  • e Total PCBs adjusted for lipids (μg/g).