Table 6

ORs for lipid-adjusted DDE and breast cancer, stratified by farming history

CasesControlsORa (95% CI)ORb (95% CI)
Never farmed
African-Americans
DDEc
<0.714750ReferentReferent
0.71 to <1.841371.23 (0.64–2.37)1.26 (0.61–2.62)
≥1.829291.05 (0.49–2.23)1.14 (0.51–2.58)
Whites
DDE
<0.3011587ReferentReferent
0.30 to <0.6693711.09 (0.71–1.66)1.19 (0.75–1.89)
≥0.6657660.73 (0.46–1.18)0.76 (0.45–1.28)
Lived or worked on farms
African-Americans
DDE
<0.714240ReferentReferent
0.71 to <1.849530.93 (0.51–1.68)0.93 (0.49–1.77)
≥1.884611.48 (0.82–2.68)1.65 (0.86–3.17)
Whites
DDE
<0.306143ReferentReferent
0.30 to <0.6653580.68 (0.39–1.18)0.74 (0.41–1.34)
≥0.6677640.99 (0.58–1.68)1.19 (0.66–2.14)
  • a Adjusted for age, age-squared, and race.

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

  • c p,p′-DDE in μg/g lipid.