Does Poverty Explain All? A Path Analysis of Single Mothers' Dietary Behaviors in Japan.

Background/

Objectives

In Japan, single mothers face a high risk of poverty and poorer dietary quality than partnered mothers; however, the pathways underlying these disparities remain unclear. This study examined whether economic status mediates the association between family structure and maternal dietary behaviors and whether intergenerational co-residence modifies these pathways.

Methods

Using nationally representative repeated cross-sectional survey data from 2018 to 2022 (N = 1319 mothers), we conducted path analysis of dietary awareness and behaviors. Family structure was classified as partnered mothers (reference), single mothers not co-residing with grandparents, and single mothers co-residing with grandparents. Economic status and frequency of shared family dinners were modeled as mediators.

Results

Compared with partnered mothers, both groups of single mothers showed poorer economic conditions, with greater disadvantage among those not co-residing with grandparents. Economic conditions accounted for substantial disparities in multiple dietary outcomes. Shared family dinners were positively associated with several dietary behaviors; however, dinner frequency did not differ significantly between partnered and single mothers or between single mothers with and without grandparental co-residence. Single mothers not co-residing with grandparents showed residual direct disadvantages in nutritionally balanced meals, breakfast frequency, and healthy dietary awareness, whereas those co-residing with grandparents showed weaker disadvantages.

Conclusions

Dietary vulnerability among single mothers in Japan was strongly associated with economic disadvantage, but not poverty alone. Intergenerational co-residence was associated with weaker disadvantage rather than eliminating it. Policies should combine income support with childcare assistance and low-burden Shokuiku or community-based meal support to strengthen resource capacity and daily healthy eating routines.