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Table 2

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

Cigarette smoking historyNo. of cases/controlsORs95% Confidence interval
Nonsmoker 87 /98 1.0  
Past smoker 86 /83 1.2 0.8–1.8 
Current smoker 76 /67 1.3 0.8–2.0 
1–30 pack-years 20 /16 1.4 0.7–2.9 
>30 pack-years 56 /51 1.2 0.8–2.0 
Cigarette smoking historyNo. of cases/controlsORs95% Confidence interval
Nonsmoker 87 /98 1.0  
Past smoker 86 /83 1.2 0.8–1.8 
Current smoker 76 /67 1.3 0.8–2.0 
1–30 pack-years 20 /16 1.4 0.7–2.9 
>30 pack-years 56 /51 1.2 0.8–2.0 
a

ORs and 95% confidence intervals were estimated by the Generalized Estimating Equations approach to correct for intracluster correlation.

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