Adjusted odds ratio (AOR) and 95% confidence interval (CI) of oral cancer associated with <i>CD44</i> genotypic frequencies and smokers among 552 betel nut consumers.

<p>The odds ratios (ORs) with their 95% confidence intervals were estimated by logistic regression models.</p><p>The adjusted odds ratios (AORs) with their 95% confidence intervals were estimated by multiple logistic regression models after controlling for age, gender and alcohol consumption.</p>a<p>Individual with wild genotype but without smoking.</p>b<p>Individual with either at least one mutated genotype or smoking.</p>c<p>Individual with both at least one mutated genotype and smoking.