Table 2

Adjusted ORs for breast cancer and 95% CIs in relation to PAH-DNA adduct levels, Long Island Breast Cancer Study Project, 1996–1997

Quantile of PAH-DNA adduct level per 108 nucleotides (range)Cases (n)Controls (n)Age-adjusted ORs (95% CI)Multivariate-adjusted ORsa (95% CI)
Quantile 1 (nondetects)1481341.001.00
Quantile 2 (0 to ≤7.7237)105721.31 (0.89–1.92)1.45 (0.97–2.17)
Quantile 3 (>7.7237 to ≤14.4212)112731.36 (0.93–1.98)1.48 (0.99–2.21)
Quantile 4 (>14.4212 to ≤21.9357)88731.09 (0.74–1.62)1.01 (0.67–1.52)
Quantile 5 (>21.9357)122721.51 (1.04–2.20)1.49 (1.00–2.21)
  • a Adjusted for age at reference date (continuous), race, history of infertility problems, season of blood donation, religion, parity (continuous), total months of lactation (continuous), BMI at age 20 (continuous), first-degree family history of breast cancer, age at first birth (centered, continuous).