Fig. 3From: Association between a single mother family and childhood undervaccination, and mediating effect of household income: a nationwide, prospective birth cohort from the Japan Environment and Children’s Study (JECS)Log-binomial regression analysis using the combinations of maternal marital status and maternal age or educational level. a Married mothers aged ≥35 years were the reference group. b Married mothers who were university graduate or higher were the reference group. RR, risk ratio; Univ., university; H.S., high schoolBack to article page