We observed a higher risk associated with alcohol consumption and smoking among homozygous GPX1(198)Leu carriers, with incidence rate ratios for colorectal cancer of 1.45 (95% CI: 1.17-1.81, P=0.02) per 10g alcohol intake per day and 2.56 (95% CI: 0.99-6.61, P=0.02) among ever smokers compared with never smokers at enrolment.
C0037369
Smoking