Table 2

ORs for lipid-adjusted DDE and PCBs and breast cancer, overall and stratified by race

CasesControlsORa (95% CI)ORb (95% CI)
All participants
DDEc
<0.394274220ReferentReferent
0.394 to <1.0442312190.96 (0.73–1.25)1.05 (0.79–1.40)
≥1.0442432201.00 (0.74–1.36)1.09 (0.79–1.51)
Total PCBsd
<0.283239219ReferentReferent
0.283 to <0.4692662201.29 (0.98–1.69)1.29 (0.97–1.72)
≥0.4692432201.21 (0.89–1.65)1.09 (0.79–1.52)
African-Americans
DDE
<0.718990ReferentReferent
0.71 to <1.890901.11 (0.72–1.72)1.12 (0.70–1.77)
≥1.8113901.37 (0.87–2.17)1.41 (0.87–2.29)
Total PCBs
<0.3127990ReferentReferent
0.312 to <0.5497901.48 (0.95–2.33)1.35 (0.84–2.16)
≥0.54116901.79 (1.07–3.01)1.74 (1.00–3.01)
Whites
DDE
<0.30176130ReferentReferent
0.30 to <0.661461290.91 (0.65–1.27)0.97 (0.68–1.40)
≥0.661341300.87 (0.62–1.24)0.98 (0.67–1.43)
Total PCBs
<0.265149130ReferentReferent
0.265 to <0.4171721291.32 (0.94–1.85)1.32 (0.92–1.90)
≥0.4171351301.19 (0.81–1.74)1.03 (0.68–1.56)
  • a Adjusted for age, age-squared, and race (all participants).

  • b Adjusted for age, age-squared, race (all participants), menopausal status, BMI, parity/lactation, HRT use, and income.

  • c p,p′-DDE in μg/g lipid.

  • d Total PCBs in μg/g lipid.