Reply to "High-Quality Meta-Analyses Are Required for Development of Evidence in Medicine"
Bibliographic record
Abstract
To the Editor—We read with interest the letter from Aalaei-Andabili and Alavian [1] regarding our systematic review and meta-analyses of interventions to prevent hepatitis C virus (HCV) transmission among persons who inject drugs [2]. They raise many important questions. We concur with their view that the methods of meta-analyses are undergoing scrutiny and change, and we also believe that exchanges such as this may contribute to further development of the methods. In our article, we did not mention that all studies included in the HCV Synthesis Project were rated for quality, with ratings based on MOOSE criteria [3]. A description of our quality rating is published elsewhere [4]. However, in this review there were not enough studies of HCV prevention to assess quality in meta-regression analyses, and there was not enough variation in quality to transform this measure into meaningful categories (eg, “lower” vs “higher” quality) with which we could compare grouped results.
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 | 0.023 | 0.143 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.003 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.003 | 0.004 |
| Scholarly communication | 0.004 | 0.006 |
| Open science | 0.004 | 0.002 |
| Research integrity | 0.030 | 0.047 |
| Insufficient payload (model declined to judge) | 0.006 | 0.005 |
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".