RESUMO
BACKGROUND: Family dysfunction has been proposed as one of the environmental mechanisms whereby risk of depression is transmitted from mothers to their children. Using our sample of offspring at high and low familial risk for depression, we hypothesized that: a) high-risk offspring (n = 79) and their mothers will report more extensive family dysfunction than low-risk offspring (n = 82) and their mothers, b) family dysfunction will predict the extent of offspring's depressive symptoms, and c) family dysfunction will mediate the impact of mother's depression on offspring's depressive symptoms. METHODS: The study enrolled 161 offspring of parents who, in a previous study, were ascertained to have either childhood onset mood disorder or no history of a major psychiatric disorder. Parents completed questionnaires and a clinical interview about themselves, their offspring, and the family, while offspring also completed questionnaires about themselves and the family. RESULTS: We found support for all three hypotheses. The significant indirect effect between maternal depression and offspring depressive symptoms was driven primarily by offspring's, but not mothers', reports of family dysfunction. LIMITATIONS: Although our assessment of mother's early history of depression was done in a previous study, it is important to note that our results do not inform about causality because of the present study's cross-sectional nature. CONCLUSIONS: The results highlight the importance of detecting and treating family dysfunction, particularly via offspring report, as one way to lower the risk of depression transmission from mothers to their children.