Prospective Examination of Objectively Assessed Physical Activity and Sedentary Time after Breast Cancer Treatment: <i>Sitting</i> on the Crest of the Teachable Moment
Bibliographic record
Abstract
BACKGROUND: This study prospectively examined patterns of objectively assessed sedentary time and moderate-to-vigorous physical activity (MVPA) during a 1-year period following completion of primary treatment among breast cancer survivors. The potential moderating effect of weight status on sedentary and MVPA time was also examined. METHODS: Breast cancer survivors [n = 177; M(SD)age = 54.9 (11.1) years, 85% White/Caucasian; 82% stage I or II cancer; M(SD)time since treatment = 3.5 (2.4) months] who were recruited into a convenience sample had weight, height, and waist circumference measured and wore Actigraph GT3X accelerometers for 1 week every 3 months for 1 year. Data were analyzed using repeated measures ANOVA. RESULTS: Survivors spent nearly 78% of their day sedentary across all time points compared with less than 2% of their day engaged in MVPA. Sedentary time remained fairly stable over 12 months, whereas MVPA levels significantly decreased. Survivors with an overweight body mass index and unhealthy waist-to-height ratio engaged in significantly less MVPA than healthy weight survivors, with significant waist-to-height ratio moderator effects for both sedentary and MVPA. CONCLUSIONS: Sedentary time remains high in the first year following treatment for breast cancer, and MVPA decreases. These trends are more pronounced for survivors who are overweight, with stronger effects noted when waist-to-height ratio was examined compared with body mass index. IMPACT: These findings suggest that breast cancer survivors may be doing very little to improve their lifestyle behaviors following a cancer diagnosis and treatments.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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".