Table 3

ORsa for prostate cancer by quartile of serum selenium levels

Selenium quartileb (ng/ml)No. of cases/controlsORs95% CIAdjusted ORsc95% CI
1 (<119.3)75 /621.01.0
2 (119.3 < 130.6)64 /630.90.5–1.50.90.5–1.4
3 (130.6 < 147.2)72 /620.90.6–1.61.00.6–1.6
4 (≥147.2)38 /620.50.3–0.90.50.3–0.9
Two-sided P for trend0.020.02
  • a ORs and 95% confidence intervals (CIs) were estimated by the Generalized Estimating Equations approach to correct for intracluster correlation.

  • b Quartiles were based on the cutpoint value of the controls.

  • c ORs were adjusted for cigarette smoking history (nonsmoker, past smoker, or current smoker) in addition to age (by matching).