Number of children and maternal mental health in the context of China's fertility policy transition: the moderating effect of employment status and the mediating effect of family environment.

Background: Having more children may be detrimental to maternal mental health during China's ongoing fertility policy transition. However, under what circumstances and how number of children could be associated with maternal mental health remains understudied in China. This study examined the association between number of children and maternal anxiety and depressive symptoms among mothers of middle school students in Shanghai, China. It also explored the moderating effect of maternal employment status and the mediating effect of family environment. Methods: Mothers of students from 7 middle schools in Shanghai were surveyed. In total, 4,215 valid questionnaires were obtained. The survey included sociodemographic information, the Generalized Anxiety Disorder Scale (GAD-7), the Center for Epidemiologic Studies Depression Scale (CES-D), and the Chinese version of the Family Environment Scale (FES-CV). Multiple linear regression analysis was performed to examine the association between number of children and maternal anxiety/depressive symptoms. Model 1 and Model 4 of SPSS PROCESS were then employed to examine the moderating effect of employment status and the mediating effect of family environment. Results: The rates of clinically significant anxiety and depressive symptoms among mothers were 13.6% and 17.6%, respectively. The moderating effect of maternal employment status was significant. Among unemployed mothers, number of children was positively associated with both maternal anxiety and depressive symptoms, whereas among employed mothers, number of children was not associated with maternal anxiety or depression. Among unemployed mothers, family environment mediated the association between number of children and maternal anxiety/depressive symptoms through the pathways of family conflict and organization. Among employed mothers, family environment suppressed the association between number of children and maternal anxiety/depressive symptoms through the pathways of family conflict, intellectual-cultural orientation, organization, control, and independence. Conclusion: Our findings suggest that number of children per se is not necessarily associated with worsened maternal mental health. Instead, the potential changes in employment participation and family environment that accompany having more children may be more relevant. Therefore, stakeholders, clinicians, and researchers should therefore focus on these aspects when addressing maternal mental health.