Depression in mothers with intellectual disabilities and borderline intellectual functioning: A longitudinal study.
Mom’s depression peaks when her child turns three and stays high for years unless you shore up social support right then.
01Research in Context
What this study did
Heyman et al. (2026) followed the mothers who have intellectual disability or borderline IQ for 15 years. They checked depression scores every three years and noted when each child turned three.
The team also tracked social support, money stress, and parenting stress to see what buffered mood.
What they found
Depression stayed high the whole time. It jumped highest when the child was three, then eased a little but never dropped to typical levels.
Moms with more friends, family help, and lower parenting stress had milder spikes.
How this fits with other research
Preston (1994) showed parent-training can teach moms with ID new skills, yet Miriam’s moms stayed sad. The gap hints skills alone don’t protect mood—ongoing emotional support is also needed.
Burford et al. (2003) found Swedish parents of kids with ID still felt lonely even with strong welfare. Miriam’s data add a 15-year timeline: without built-in social networks, depression lingers.
Eugenia Gras et al. (2003) cut parent stress in just 16 weeks. Miriam shows stress can rebound for years, so brief programs may need boosters as the child grows.
Why it matters
If you serve families headed by a mom with ID, mark the child’s third birthday on your calendar. Schedule a depression screen that month and map out at least two steady supports—maybe a weekly parent group and a respite slot. Small, reliable social ties can shave points off a depression score for the next decade.
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02At a glance
03Original abstract
BACKGROUND: Parents with intellectual disabilities (ID) experience economic and social marginalization that increase their vulnerability for adverse mental health outcomes. Longitudinal research is necessary to understand the development of such outcomes in relation to raising a child for parents with ID. METHOD: This study uses longitudinal data from the Future of Families and Child Wellbeing Study (FFCWS). Multilevel mixed-effects logistic regression was employed to examine rates and risk factors of depression among a total sample of N = 435 mothers with ID and borderline intellectual functioning (IF) across Years 1-15. RESULTS: For mothers with ID and borderline IF, rates of depression were consistently elevated, and the highest risk was observed when their child was 3 years old, even when adjusting for multiple sociodemographic and contextual variables. Being married/partnered and having higher levels of social support were associated with lower odds, whereas having higher levels of parenting stress and material hardship were associated with higher odds of depression. CONCLUSIONS: Given the consistently high rates of maternal depression, interventions are needed across the span of parenthood and child development for mothers with ID and borderline IF. Developmentally appropriate supports are especially needed during early childhood.
Research in developmental disabilities, 2026 · doi:10.1016/j.ridd.2026.105211