Proton pump inhibitors and gastric cancer: association is not causation
Bibliographic record
Abstract
We read the article by Cheung et al 1 with interest. The research question whether there is a dose-related association between proton pump inhibitors (PPIs) and gastric cancer in a country where this malignancy is highly prevalent is an important one. They report that long-term PPI therapy is associated with an increased risk of gastric cancer in patients who have received Helicobacter pylori eradication therapy. The data suggest that patients taking PPI less than once per day had a lower risk of gastric cancer than did those taking PPIs at least daily, which would support there may be a dose-related response. There are many concerns that were not adequately addressed in the paper. The paper claims that all the subjects became H. pylori negative as they had all been prescribed eradication therapy and none had received subsequent therapy. However, no data on proof of cure were provided. There …
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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 | 0.003 | 0.034 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.003 |
| Scholarly communication | 0.002 | 0.005 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.019 | 0.028 |
| Insufficient payload (model declined to judge) | 0.006 | 0.004 |
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".