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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 /62 1.0  1.0  
2 (119.3 < 130.6) 64 /63 0.9 0.5–1.5 0.9 0.5–1.4 
3 (130.6 < 147.2) 72 /62 0.9 0.6–1.6 1.0 0.6–1.6 
4 (≥147.2) 38 /62 0.5 0.3–0.9 0.5 0.3–0.9 
Two-sided P for trend  0.02  0.02  
Selenium quartileb (ng/ml)No. of cases/controlsORs95% CIAdjusted ORsc95% CI
1 (<119.3) 75 /62 1.0  1.0  
2 (119.3 < 130.6) 64 /63 0.9 0.5–1.5 0.9 0.5–1.4 
3 (130.6 < 147.2) 72 /62 0.9 0.6–1.6 1.0 0.6–1.6 
4 (≥147.2) 38 /62 0.5 0.3–0.9 0.5 0.3–0.9 
Two-sided P for trend  0.02  0.02  
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).

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