Adjusted odds ratios (ORs) (AORs) and 95% confidence interval (CIs) of oral cancer associated with CA9 genotypic frequencies and smokers among 444 betel-nut consumers.

The ORs with their 95% CIs were estimated by logistic regression models. The AORs with their 95% CIs were estimated by multiple logistic regression models after controlling for age, gender, and alcohol consumption.aIndividuals with the wild-type genotype but without smoking.bIndividuals with either at least 1 mutated genotype or smoking.cIndividuals with both at least 1 mutated genotype and smoking.*Statistically significant at p