Association between sedentary behaviour and risk of dementia: an evidence gap
Bibliographic record
Abstract
Given the lack of a cure, it is important to investigate risk factors for dementia to target prevention initiatives. A study recently published in Translational Psychiatry by Yan et al. 1 examines the association between sedentary behaviour [sic] and the risk of dementia. However, the authors have misused the term sedentary behaviour, which misrepresents their findings and leads to a false conclusion. Historically, sedentary behaviour was used to denote lack of physical activity. Now ‘sedentary behaviour’ is defined as “any waking behaviour characterized by energy expenditure ≤1.5 metabolic equivalents while in a sitting, reclining or lying posture” 2 . In contrast, the term ‘physical inactivity’ is defined as “an insufficient physical activity level to meet present physical activity recommendations” 2 . For example, the World Health Organization (WHO) states the global physical activity guidelines as 150 min of moderate-intensity, or 75 min of vigorous-intensity aerobic physical activity a week (WHO, 2020 3 ). As many people in today’s society are both physically inactive and sedentary 4 , it is imperative that we differentiate between these two terms.
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 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".