Adjusted odds ratios (ORs, AORs) and 95% confidence intervals (CIs) of oral cancer associated with <i>MTNR1A</i> genotypic frequencies and betel nut chewing among 748 smokers.

<p>ORs with their 95% CIs were estimated by logistic regression models.</p><p>AORs with their 95% CIs were estimated by multiple logistic regression models after controlling for age, gender, and alcohol consumption.</p><p>^a Individuals with a wild genotype but without betel nut chewing.</p><p>^b Individuals with either at least one mutated genotype or betel nut chewing.</p><p>^c Individuals with at least one mutated genotype and betel nut chewing.</p><p>Adjusted odds ratios (ORs, AORs) and 95% confidence intervals (CIs) of oral cancer associated with <i>MTNR1A</i> genotypic frequencies and betel nut chewing among 748 smokers.