LAUSR

BACKGROUND The early life period provides a critical foundation for child health and development, and mothers exert great influence as primary caregivers. Previous studies have shown that single-motherhood is associated with negative child outcomes. In Japan, few studies have addressed the situation faced by single-mothers with young children, such as living conditions and mental health issues. METHODS We utilized nationwide data from the Comprehensive Survey of Living Conditions (2016), collected by the Japanese Ministry of Health, Labour and Welfare and compared mothers from single-mother households with those from two-parent households, with further subdivision by intergenerational cohabitation. Socio-demographic characteristics, lifestyle habits, psychological distress, subjective health status, and stress were examined. RESULTS We observed that single-mothers without intergenerational cohabitation seemed to experience harsh living conditions compared to other types of households. Severe psychological distress was observed in 11% of single-mothers without cohabitation compared with 6% among single-mothers with cohabitation and 4% among mothers of two-parent households. Multivariate analysis adjusting for demographic variables showed about a two-fold increased risk of severe psychological distress (OR=2.34, 95% CI: 1.71-3.22) associated with single-mothers without intergenerational cohabitation compared to mothers from two-parent household without cohabitation. Single-mothers without cohabitation tended to smoke and drink alcohol frequently and seemed sleep-deprived. LIMITATIONS Due to the cross-sectional design, we could not make inference on causality. CONCLUSIONS Our study highlighted needs for targeted support for single-mothers without intergenerational cohabitation. Efforts in public health and other related fields may present opportunities to reduce negative intergenerational impacts of adversities among socially vulnerable families.