Is it time for Canada to revisit its approach to prostate cancer screening?
Bibliographic record
Abstract
Prostate cancer is the third leading cause of cancer death among Canadian men. Despite advances in the last decade mitigating overdiagnosis and overtreatment, Canadian guidelines have recommended against routine prostate-specific antigen (PSA) screening since 2014. This has resulted in opportunistic screening, marked by inequitable access, low-value testing, and missed opportunities for early detection. We review global policy developments, emerging trial data, and implementation strategies, which suggest that organised, risk-stratified screening may improve outcomes and equity. However, overdiagnosis and associated harms remain a concern within organised programs. To address this uncertainty and generate timely, policy-relevant evidence, we propose implementing population-wide, adaptive platform trials embedded in the healthcare system. This design would enable real-time integration of new technologies, standardised protocols, and equitable access-hallmarks of a learning healthcare system. Such a model could help Canada modernise prostate cancer screening while carefully weighing benefits, harms, and equity in a rapidly evolving landscape.
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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.003 | 0.000 |
| Bibliometrics | 0.000 | 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) | 0.000 | 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".