Abstract
We used Swedish national register data (N = 2,828,777) to examine divorce and its associated patterns of family genetic risk scores (FGRS; personalized measures of genetic risk inferred from diagnoses in relatives) across ten psychiatric disorders: major depression, anxiety disorders, obsessive-compulsive disorder, bipolar disorder, schizophrenia, anorexia nervosa, alcohol use disorder, drug use disorder, ADHD, and autism-spectrum disorder. Individuals who divorced had elevated FGRS across all disorders compared to those who were stably married or never married. FGRS for all disorders were higher among divorced females compared to divorced males; among those who did not go on to have a stable second marriage compared to those who had a stable second marriage; and increased as the cumulative number of divorces increased. In summary, genetic predispositions for psychiatric disorders are associated with the propensity to divorce, and with several differences as a function of sex, remarriage, and the cumulative number of divorce transitions.