Screen-based media use, physical activity level and body mass index of children and youth in Nova Scotia
Bibliographic record
Abstract
There is an increasing trend towards overweight and obesity in children and youth in North America. This trend has typically been associated with poor nutritional practices and reduced physical activity. Certain leisure time activities such as the number of hours of television viewing, playing video games and internet/computer use have also been implicated. Objective: The goal of this project was to assess the relationships between objectively measured physical activity, BMI, and screen-based media use. Participants: We studied a large, random sample of male and female grade 3, 7 and 11 (n=1643) students in the province of Nova Scotia. Design/Setting: A child/youth questionnaire was administered to gather information on media use of participants. Height and weight were recorded for each participant and an accelerometer was worn for 7 consecutive days. Results: Physical activity to achieve health benefits (defined as 60 minutes or more of moderate to vigorous physical activity 5 or more days per week) in this population decreased significantly between grades 3 and 7 and females were particularly at risk. The use of media increased with age but did not always relate significantly to physical activity levels or BMI in this population. Conclusion: Leisure time pursuits including television viewing and screen-based media use in general, do not seem to have the direct relationships with physical inactivity and increasing BMI that have previously been reported.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".