TLDR
Teaching babies better sleep did not cause lasting harm or lasting benefits by age six. Families and health workers can use these methods to ease sleep troubles and reduce mothers’ depression in the months afterward.
Summary
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1 Study Aim
The authors examined whether a behavioral infant sleep program (sleep-help methods that change bedtime routines) caused lasting benefits or harm by age six. They assessed children’s emotional health, sleep, daily functioning, stress responses, and relationships with parents. They also assessed mothers’ mental health and parenting. The study addressed concerns that these methods might damage emotional development or later well-being. The study asked whether helping babies sleep better would change children or families years later.
2 Study Design
The research was a five-year follow-up of a population-based cluster-randomized trial (a study assigning groups of families to different care approaches). The original sample included 692 infants from well-child centers. Researchers selected 326 infants with parent-reported sleep problems at seven months, including 173 receiving the program. Nurses provided behavioral techniques during one to three consultations at eight to ten months. Control families received usual care. Group assignments were concealed, and researchers did not know assignments. Parents did know. At age six, 225 families, or 69%, participated. Researchers measured child sleep, mental health, psychosocial functioning (how children manage feelings and relationships), stress, parent-child relationships, attachment, and maternal mental health and parenting. The researchers compared families who received the sleep help with families who received normal care.
3 Findings
The authors found no evidence of differences between groups across any measured outcome at age six. Emotional and conduct behavior, sleep problems, sleep habits, and psychosocial functioning were similar. Sleep problems affected 9% of intervention children and 7% of control children. Chronic stress affected 29% and 22%, respectively. Parent-child closeness, conflict, overall relationship quality, and disinhibited attachment (difficulty maintaining expected closeness with caregivers) also showed no differences. Mothers’ depression, anxiety, stress, and authoritative parenting (warm, firm, and responsive parenting) were similar. The authors concluded that these methods had no marked long-term positive or negative effects. They recommended using them to reduce infant sleep problems and maternal depression over the short to medium term. Helping babies sleep did not change children’s or mothers’ well-being several years later.