Use of Thiazolidinediones and Risk of Heart Failure in People With Type 2 Diabetes: A Retrospective Cohort Study
Bibliographic record
Abstract
There is a growing concern that use of thiazolidinediones (TZDs) is associated with congestive heart failure (CHF) (1), though the causality of this relationship has not been established. Commentaries and case reports about this potential side effect have frequently appeared in the press, but peer-reviewed, large-scale epidemiologic studies have been absent. A few European nations have already limited the use of TZDs despite the absence of empirical evidence. A recently published, longitudinal observational study by Delea et al. (2) reported that initiation of TZDs was associated with an increased risk of incident CHF (hazard ratio 1.7; P < 0.001). While we welcome this first population-based study of TZD use and CHF, we have serious concerns regarding the methodology employed. Our primary concern with the study by Delea et al. (2) is the potential for residual confounding by indication or severity (3). For example, this study did not measure or adjust for levels of glycemia, a known risk factor for CHF in diabetes …
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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 | 0.002 | 0.010 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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".