Table 2

Age-adjusted ORsa and 95% confidence intervals for prostate cancer by cigarette smoking

Cigarette smoking historyNo. of cases/controlsORs95% Confidence interval
Nonsmoker87 /981.0
Past smoker86 /831.20.8–1.8
Current smoker76 /671.30.8–2.0
1–30 pack-years20 /161.40.7–2.9
>30 pack-years56 /511.20.8–2.0
  • a ORs and 95% confidence intervals were estimated by the Generalized Estimating Equations approach to correct for intracluster correlation.