Trial reportThe Journal of adolescent health : official publication of the Society for Adolescent Medicine2015
The Impact of Early Bedtimes on Adolescent Caloric Intake Varies by Chronotype.
Trial report in The Journal of adolescent health : official publication of the Society for Adolescent Medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
16 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.
- Preventing and treating childhood obesity by sleeping better: a systematic review.Frontiers in endocrinology · 2024Pooled it
- Examining the impact of total sleep duration on daily affect among short-sleeping adolescents: an experimental study.Annals of behavioral medicine : a publication of the Society of Behavioral Medicine · 2026Trial
- Earlier bedtimes and more sleep displace sedentary behavior but not moderate-to-vigorous physical activity in adolescents.Sleep health · 2022Trial
- Impact of Multi-Night Experimentally Induced Short Sleep on Adolescent Performance in a Simulated Classroom.Sleep · 2017Trial
- Circadian misalignment and adolescent obesity risk behaviors: physical & sedentary activity, dietary intake, and food reward.Sleep advances : a journal of the Sleep Research Society · 2026Article
- Feasibility of an At-Home Experimental Circadian Misalignment Induction for Adolescents.Clocks & sleep · 2025Article
- The forbidden zone for sleep is more robust in adolescents compared to adults.Frontiers in sleep · 2024Article
- Examination of Sleep and Obesity in Children and Adolescents in the United States.American journal of health promotion : AJHP · 2022Article
- Chronotype: Implications for Epidemiologic Studies on Chrono-Nutrition and Cardiometabolic Health.Advances in nutrition (Bethesda, Md.) · 2019Review
- Poor sleep and adolescent obesity risk: a narrative review of potential mechanisms.Adolescent health, medicine and therapeutics · 2019Article
- Sleep timing is associated with self-reported dietary patterns in 9- to 15-year-olds.Sleep health · 2017Article
- Circadian Rhythm and Sleep Disruption: Causes, Metabolic Consequences, and Countermeasures.Endocrine reviews · 2016Review
- Development of a Behavioral Sleep Intervention as a Novel Approach for Pediatric Obesity in School-aged Children.Sleep medicine clinics · 2016Review
- Development of a Behavioral Sleep Intervention as a Novel Approach for Pediatric Obesity in School-aged Children.Pediatric clinics of North America · 2016Review
- Role of sleep quality in the metabolic syndrome.Diabetes, metabolic syndrome and obesity : targets and therapy · 2016Review
- Behavioral and social routines and biological rhythms in prevention and treatment of pediatric obesity.The American psychologistReview
Corrections and comments
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Authors and funding
5 authors at 4 institutions in 1 country.
Funding
Abstract
purposeAdolescent sleep restriction is common and can lead to overeating. Here, we test whether lengthening sleep via early bedtimes affects dietary intake differently for adolescents accustomed to a later sleep phase ("night owls") versus an earlier sleep phase ("morning larks").
methodsUsing a randomized cross-over design, 67 adolescents changed bedtimes to create five-night periods of sleep restriction (6.5 hours in bed) versus healthy sleep (10 hours in bed). Caloric intake was measured via validated interviews. Phase preference was based on participants' premanipulation sleep.
resultsActigraphy verified that the manipulation altered sleep regardless of phase preference. Phase preference moderated the effect of the manipulation on cumulative caloric intake (p = .01-.03). Night owls showed little effect, but morning larks reduced their evening intake during healthy sleep.
conclusionsAn "early to bed" approach confers little dietary benefit for night owls but may have a protective effect for adolescents who gravitate toward earlier bedtimes.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.