or average age (OR=2.42; CI: 1.74-3.37). The interaction between age at onset and sex was non-significant (OR=0.97; CI: 0.77-1.22), indicating that although the prevalence of AD was higher for males than females (χ2 (1)=181.79; p<0.001), the association between age at initiation of alcohol use and risk for AD was consistent across sexes. The correlation between age at first drink (categorized as a three-level variable) and AD for the full sample was 0.31 (p = 0.02).
