Table 2

Age- and lipid-adjusted geometric means for PCBs and DDE among breast cancer cases and controls by study site

VariablenDDE (ppb)PCBs (ppb)
Mean95% CIPaMean95% CIPa
All subjects
Cases475460.1423.1–500.50.89733.1706.3–761.00.46
Controls502456.2420.5–494.9747.6721.0–775.1
Tolland County
Cases149489.6424.9–564.00.17843.8776.0–917.50.73
Controls155425.9370.8–489.1861.3793.5–934.8
New Haven County
Cases326451.4407.0–500.70.44687.4662.6–713.10.42
Controls347477.8432.2–528.2702.1677.6–727.5
  • a P for geometric mean difference between cases and controls.