I03 Evaluation of life time physical activity levels in Huntington's disease
Bibliographic record
Abstract
Background Environmental factors may influence the onset and progression of neurodegenerative disorders, either directly or by interacting with genetic risk factors. Trembath and colleagues interviewed individuals with a formal clinical diagnosis of Huntington9s disease (HD) and found that those who led a more passive lifestyle had an earlier age of onset than those who were less passive.1 Aims To establish the feasibility of using self-completion questionnaires to gather life time physical activity levels in a group of early stage and premanifest HD individuals from the TRACK-HD cohort so that this data could be compared to clinical outcomes in TRACK-HD study. Methods A self-report questionnaire was developed based on the Leisure Time Exercise Questionnaire by Godin et al.2 Activity levels were calculated across activities undertaken at home, at work and during recreation and for life stages from the teenage years, across each decade to the current age or age of disease onset. Life-time activity was categorised as strenuous, moderate or light, and activity scores were calculated from the frequency and duration of each activity. Results Retrospective data were collected from 277 participants (89 controls, 109 premanifest gene carriers, 79 HD Stage I/II) and the data used to distinguish the most and least physically active individuals. Modes of activity were also investigated. Conclusions Although retrospective data may be limited by recall bias, our data suggests that it is possible to use a general measure of life time physical activity levels. Such a life course perspective on physical activity may be a useful adjunct to the assessment of physical activity with more direct quantitative measures. References 1. Trembath MK, et al. A retrospective study of the impact of lifestyle on age at onset of Huntington disease. Mov Disord 2010;25:1444–50. 2. Godin G, Shephard RJ. Godin leisure time exercise questionnaire. Med Sci Sports Exerc 1997:S36–8.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 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) | 0.001 | 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".