Prospective association of device‐based physical activity and sedentary time during childhood with mental health outcomes during adolescence
Bibliographic record
Abstract
BACKGROUND: The present study aimed to analyze associations between device-measured physical activity and sedentary time during childhood with mental health-related outcomes throughout adolescence. METHODS: Data from the Millennium Cohort Study were used. Device-measured physical activity (i.e., light and moderate-to-vigorous physical activity) and sedentary time were assessed at 7 years. Internalizing and externalizing symptoms were assessed at three time points (11 years, 14 years, and 17 years) via the Strengths and Difficulties Questionnaire. Depressive symptoms were estimated using the Mood and Feelings Questionnaire at 14 years. Psychological distress was assessed using the six-item Kessler psychological distress scale at 17 years. Negative binomial regression models, adjusting for potential confounders were used. RESULTS: Among boys, greater time spent in moderate-to-vigorous physical activity at 7 years was associated with higher hyperactivity and lower peer problems throughout adolescence. Higher moderate-to-vigorous (incidence rate ratio [IRR]: 0.95; 95% confidence interval [CI]: 0.93-0.98), light (0.90; 0.85-0.95), and total activity time (0.95; 0.93-0.98) at 7 years were associated with lower, while sedentary time was associated with higher (1.11; 1.07-1.16) psychological distress at 17 years in the adjusted models. Girls who spent more time in light physical activity at 7 years were more likely to have lower hyperactivity levels over adolescence, while higher sedentary time at the same age was associated with higher hyperactivity levels. Higher sedentary time at 7 years was associated with higher depressive symptoms at 14 years (1.06; 1.01-1.10), whereas light physical activity at 7 years (0.91; 0.85-0.97) was associated with lower depressive symptoms at 14 years in the adjusted models. CONCLUSION: Higher moderate-to-vigorous, light physical activity, and lower sedentary time were associated with lower peer problems, depressive symptoms, and psychological distress throughout adolescence.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| 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".