We used Swedish national registers to identify a sample of twin and sibling pairs for whom there were data on AUD and divorce. We used tetrachoric correlations to investigate the association between AUD and divorce. We used twin and sibling models to estimate the genetic and environmental influences on divorce; to estimate the genetic and environmental sources of covariation between AUD and divorce; and to estimate the latent genetic and environmental correlations between AUD and divorce. We examined sex differences in all analyses. For the twin and sibling analyses, we also tested for the inclusion of a unique twin environment parameter and age covariate.
