Sleep difficulties as a universal risk factor for injury among adolescents in 46 countries
Bibliographic record
Abstract
Abstract Background Poor sleep is common among adolescents and associated with unintentional injuries. The current evidence base is limited by differences in measures of sleep and injury implemented across studies. We examined the potential universality of the relationship between poor sleep and injury cross-nationally using self-reports from 229,589 adolescents in 46 countries that were collected using common procedures and measures. Methods A cross-sectional study was conducted using records from the 2017/18 Health Behaviour in School-aged Children (HBSC): World Health Organization cross-national study. The prevalence of sleep indicators (difficulties in falling asleep, insufficient sleep, social jet lag) and medically treated injuries (overall, multiple) were described across countries and by gender. Multivariable modified Poisson regression analyses were conducted within and across countries to test the consistency of the association between poor adolescent sleep and injuries. Results Overall, indicators of poor sleep were reported by nearly half of adolescents, and varied by gender and across countries. Country-level analyses found consistently positive associations between indicators of poor sleep and injuries. Pooled (multi-country) analyses further demonstrated a universality of these relationships across sleep indicators and injury outcomes. The strength of relationships varied by gender, with more robust associations detected among girls compared to boys. Conclusions Poor sleep is a robust and mainly consistent risk factor for injury among adolescents across countries and regions. Public health officials and policymakers should therefore recognize adolescent sleep as a health priority. The promotion of sleep hygiene may represent a novel target for injury prevention at regional and national levels. Key messages • Poor sleep, in the form of sleep difficulties, insufficient sleep, and social jet lag, were robust and mainly consistent injury risk factors among adolescents across 46 countries. • Public health officials should recognize sleep hygiene as a novel focus for adolescent injury prevention.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".