SynthesisPloS one2025
RETRACTED: Cardiovascular and mortality outcomes of DPP-4 inhibitors vs. sulfonylureas as metformin add-on therapy in patients with type 2 diabetes: A systematic review and meta-analysis.
Synthesis in PloS one, 2025. The graph read 2 numbers from its abstract, feeding 4 cells of the map: it . It has been retracted, and should not be counted. Cited by 2 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
Meta-analysis revealed a significantly lower risk of both major adverse cardiovascular events (risk ratio [RR]: 0.79; 95% confidence interval [CI]: 0.73-0.84; p < 0.001) and all-cause mortality (RR: 0.79; 95% CI: 0.71-0.88; p < 0.001) in patients with diabetes treated with DPP-4 inhibitors plus metformin compared to those treated with SUs plus metformin.
Meta-analysis revealed a significantly lower risk of both major adverse cardiovascular events (risk ratio [RR]: 0.79; 95% confidence interval [CI]: 0.73-0.84; p < 0.001) and all-cause mortality (RR: 0.79; 95% CI: 0.71-0.88; p < 0.001) in patients with diabetes treated with DPP-4 inhibitors plus metformin compared to those treated with SUs plus metformin.
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Where it lands on the map
Rows are treatments, columns are outcomes. The coloured squares are the cells this paper feeds, coloured by the vote it casts there. Click one to jump to what this paper adds to it.
What it adds to each cell
For every cell the paper feeds: the belief in the claim with and without this paper, and this paper's estimate drawn against every other readable study in the cell. The ringed dot is this paper.
DPP-4 inhibitors×all-cause mortality
No readable resultOpen on the map →What to test next →No other readable study in this cell yet. This paper is the evidence.
DPP-4 inhibitors×cardiovascular events
No readable resultOpen on the map →What to test next →3 readable studies in this cell: 2 favour the treatment, 1 find no difference, 0 favour the comparator.
This paper's own estimate is on a different scale from the rest of the cell, so it is not drawn here.
Metformin×all-cause mortality
No readable resultOpen on the map →What to test next →1 readable study in this cell: 0 favour the treatment, 1 find no difference, 0 favour the comparator.
This paper's own estimate is on a different scale from the rest of the cell, so it is not drawn here.
Metformin×cardiovascular events
No readable resultOpen on the map →What to test next →5 readable studies in this cell: 4 favour the treatment, 1 find no difference, 0 favour the comparator.
This paper's own estimate is on a different scale from the rest of the cell, so it is not drawn here.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Risk of fracture with sodium-glucose cotransporter-2 inhibitors in patients with type 2 diabetes: an updated meta-analysis of randomized controlled trials.International journal of physiology, pathophysiology and pharmacology · 2025Review
- Article
Corrections and comments
- Retraction · 2025-12-17Breach of Policy by Author · Concerns/Issues about Article · Investigation by Journal/Publisher · Objections by Author(s) · Unreliable Results and/or Conclusions ·
- Retracted
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The marked sentences are the ones the graph read a number from.
backgroundType 2 diabetes significantly increase the risk of cardiovascular disease and mortality. This systematic review and meta-analysis compared cardiovascular and mortality outcomes in type 2 diabetes patients receiving dipeptidyl peptidase-4 inhibitors (DPP-4is) plus metformin versus sulfonylureas (SUs) plus metformin as add-on therapy.
methodsPubMed, Web of Science, Cochrane Central Register of Controlled Trials, Embase, Google Scholar, and Scopus were searched through January 1, 2025, for studies comparing DPP-4is plus metformin versus SUs plus metformin in type 2 diabetes patients. Outcomes of interest were major adverse cardiovascular events and all-cause mortality. Heterogeneity was assessed using Cochran's Q test and I2 statistic. Publication bias was evaluated with Begg's and Egger's tests. Study quality was assessed with the Jadad scale (for randomized controlled trials) and the Newcastle-Ottawa Scale (for observational studies).
resultsTwenty-seven studies (2012-2024), encompassing 1,505,821 participants, were included in the analysis. Major adverse cardiovascular events were reported in 21 studies, and all-cause mortality data were available from 19 studies. Meta-analysis revealed a significantly lower risk of both major adverse cardiovascular events (risk ratio [RR]: 0.79; 95% confidence interval [CI]: 0.73-0.84; p < 0.001) and all-cause mortality (RR: 0.79; 95% CI: 0.71-0.88; p < 0.001) in patients with diabetes treated with DPP-4 inhibitors plus metformin compared to those treated with SUs plus metformin. No publication bias was detected.
conclusionIn type 2 diabetes patients treated with metformin, adding a DPP-4is is associated with significantly lower risks of major adverse cardiovascular events and all-cause mortality compared to adding an SUs. These findings underscore the potential cardiovascular benefits of DPP-4is and their role in improving patient outcomes.
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What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.