Childhood familial environment and adulthood depression: evidence from a Chinese population-based study

Background: Mental disorders have become an important public health issue and evidence is lacking on the impact of childhood experience on adulthood mental health in regions of low and middle income. Using national representative data from the China Health and Retirement Longitudinal Study, we aimed to explore the impact of childhood familial environment on adulthood depression. Methods: A total of 19 485 subjects were interviewed. The survey collected information on demographic variables, variables of childhood familial environment and potential pathway variables, including childhood health status, adulthood physical health status, adulthood social support and adulthood socio-economic status (SES). Depressive symptoms were measured by the 10-item version of the Center for Epidemiological Studies Depression Scale. Results: Parents' physical and mental health during the subjects' childhood were significantly associated with adulthood mental health. Mothers' smoking, unfair treatment and low family SES were associated with higher depressive symptoms in adulthood. Childhood physical and mental health status, adulthood physical health and adulthood SES might be important mediators in the pathways of childhood familial environment affecting adulthood depressive symptoms. Conclusions: This study is the first to explore the relationship of childhood familial environment and adulthood depression in China. The results indicate that parents' physical and mental health, health behaviour and treatment equity among children a important predictors for adult depression.