Dietary intake, activity patterns and weight status of adolescents in economically disadvantaged communities
Bibliographic record
Abstract
Dietary intake, activity patterns and weight status of 477 grade six students were assessed as part of the longitudinal prevention project, Better Beginnings, Better Futures. Over 1/3 (36.7%) of adolescents did not eat breakfast everyday and 18.9% did not meet Canada's Food Guide for any food groups. The proportion of adolescents >=Dietary Reference Intakes for energy, fiber, calcium and folate was <34%, <3%, <17%, and <43%, respectively. Participation rates for most physical activities were low. Males (62.1%) were more likely to play computer/video games "4 or more times a week" than females ([chi]2 = 39.4; p < .001). Both males (34.1%) and females (39.2%) were >=85th percentile for BMI. Self-reported measures were not valid; only 50% and 82.6% of respondents were accurate within 5% of measured weight and height, respectively. Overall, negative health behaviours are present and should be targeted for improvement.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 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) | 0.001 | 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".