ArticleThe Journal of clinical endocrinology and metabolism2025
Association of Nighttime Sleep Duration at 1.5 Years With Height at 3 Years: The Japan Environment and Children's Study.
Article in The Journal of clinical endocrinology and metabolism, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Earlier bedtime at 1.5 years is associated with greater height gain at 3 years of age: a nationwide birth cohort study of the Japan environment and children's study.Frontiers in public health · 2026Article
- A review of sleep-related indicators measured in large population-based cohort studies in Japan.Environmental health and preventive medicine · 2026Review
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Authors and funding
6 authors.
Funding
Abstract
contextAdequate nighttime sleep duration has been considered beneficial for linear growth in children; however, there is limited and conflicting evidence regarding the association between sleep duration and subsequent linear growth.
objectiveTo investigate the association between sleep duration at 1.5 years and height at 3 years of age.
methodsThe Japan Environment and Children's Study is a nationwide prospective birth cohort study. Data from 52 140 term singleton births born at an appropriate-for-gestational age without background disorders that could potentially affect linear growth in the analyses were included. Nighttime and total sleep durations were calculated based on a self-administered questionnaire completed by caregivers. Tall stature was defined as height at or above the 75th percentile among participants.
resultsAfter adjustment for height at 1.5 years, sex, monthly age, mother's height, presence of siblings at 1.5 years, environmental tobacco smoke at 1.5 years, daily TV/DVD screen time at 2 years, attendance at nursery at 2 years, household annual income at birth, and parents' educational status, multivariate odds ratio (95% CI) for tall stature at 3 years were 1.09 (1.01-1.17), 1.09 (1.01-1.17), and 1.25 (1.14-1.37) for 9.5 or 10, 10.5 or 11, and ≥ 11.5 hours of nighttime sleep duration at 1.5 years, respectively, compared with those with ≤ 9 hours sleep (P for trend <.0001). Total sleep duration was not associated with tall stature.
conclusionThis study underscores the importance of nighttime sleep duration, not total sleep duration, in the linear growth of very young children.
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