Objective Poverty is a factor that affects children's health through its role in parental depression and stress. While the association between financial status and depression or quality of life scores of mothers has been previously reported in Japan, no study has focused on mothers' subjective health and physical fatigue perceptions. This study aimed to examine the relationship between mothers' financial anxiety and subjective health and physical fatigue perceptions.Methods We conducted a survey in parents attending routine health checkups for their 18-month-old infant in a single area of City A between November 2017 and October 2019. After excluding those for whom the required analysis data were missing, we analyzed data from 779 parents who responded to the survey and consented to the use of their children's health checkup data. The response variables were maternal subjective health and physical fatigue perceptions, and the explanatory variables were the presence of financial anxiety in mothers at their child's 3- or 18-month health checkups and financial anxiety situation in both periods. Financial anxiety was classified into four groups according to status at the 3- and 18-month time points. The independence of the qualitative variables among these four groups was verified using Fisher's exact test, and the relationship between financial anxiety and maternal subjective health and physical fatigue perceptions was evaluated using logistic regression analysis.Results Financial anxiety was present in 54 mothers (6.9%) and 46 mothers (5.9%) at the 3- and 18-month checkup, respectively. Analysis of financial anxiety in both periods showed that 695 mothers (89.2%) had no financial anxiety at either time point, 30 (3.9%) had financial anxiety only at the 18-month checkup, 38 (4.9%) had financial anxiety only at the 3-month checkup, and 16 (2.1%) had financial anxiety at both time points. At the 18-month checkup, the odds ratios of poor subjective health and severe physical fatigue perceptions were 3.85 (95% confidence interval [CI]; 1.34-11.05) and 6.58 (95% CI; 2.18-19.85), respectively, among the mothers who had financial anxiety at both time points compared to those who had no financial anxiety at either time point.Conclusion Financial anxiety may affect mothers' health. Therefore, mothers should be provided with solution-oriented support geared toward mitigating financial anxiety, in coordination with affiliated organizations, if financial anxiety is detected.

[Association between financial anxiety and subjective health and physical fatigue perceptions among mothers of 18-month-old infants].