The examination of the relationship of body mass index and body weight perception to physical activity in a national sample of female adolescents
Bibliographic record
Abstract
This thesis evaluated the relationships between body mass index (BMI), body weight perception and physical activity in Canadian female adolescents. Data were derived from a national study of barriers to physical activity among youth in 2002. A total of 893 females aged 13–18 completed the survey. Multiple linear regression, Pearson correlations and Student t-tests were used to evaluate the relationships. Based on self-reported height and weight using Centre for Disease Control growth charts, 11.5% were overweight (8.8%) or obese (2.7%). Daily vigorous physical activity was associated with significantly lower BMI and females with self overweight perception reported fewer days of vigorous activity. BMI and body weight perception were not significant predictors of reported physical activity in the multiple regression models. Therefore, significant relationships exist between BMI, body weight perception and physical activity and must be addressed in policies dealing with the promotion of physical activity in female youth.
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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 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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) | 0.002 | 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".