Evidence map›Paper›PMID 34922433›Full record

ArticleKidney research and clinical practice2021

Metformin use and cardiovascular outcomes in patients with diabetes and chronic kidney disease: a nationwide cohort study.

Min-Ho Kim, Hyung Jung Oh, Soon Hyo Kwon, Jin Seok Jeon, Hyunjin Noh, Dong Cheol Han, Hyoungnae Kim, Dong-Ryeol Ryu

Open access · diamondAbstract read
In one paragraph

Article in Kidney research and clinical practice, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
1.2field-weighted citation impact, top 20% of its field
1 · What the graph read from it

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.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 11 citations in OpenAlex.

  1. Pooled it
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  4. Stopping Versus Continuing Metformin in Patients With Advanced CKD: A Nationwide Scottish Target Trial Emulation Study.American journal of kidney diseases : the official journal of the National Kidney Foundation · 2025 · on this map
    Observational
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 1 country.

Min-Ho KimEwha Institute of Convergence Medicine, Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea.
Hyung Jung OhDepartment of Nephrology, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.
Soon Hyo KwonDepartment of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea.
Jin Seok JeonDepartment of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea.
Hyunjin NohDepartment of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea.
Dong Cheol HanDepartment of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea.
Hyoungnae KimDepartment of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea.
Dong-Ryeol RyuDepartment of Internal Medicine, Ewha Womans University School of Medicine, Seoul, Republic of Korea.
Soonchunhyang University Hospital Seoul · KREwha Womans University · KR

Funding

National Research Foundation of Korea 2019R1G1A1100498
6 · The paper itself

Abstract

backgroundMetformin has recently been shown not to increase the risk of lactic acidosis in patients with chronic kidney disease (CKD). Thus, the criteria for metformin use in this population has expanded. However, the relationship between metformin use and clinical outcomes in CKD remains controversial.

methodsThis study considered data from 97,713 diabetes patients with an estimated glomerular filtration rate of <60 mL/min/1.73 m2. The primary outcome was major adverse cardiac and cerebrovascular events (MACCE), and the secondary outcomes were all-cause mortality and incident end-stage renal disease (ESRD).

resultsMetformin users had a significantly higher risk of MACCE than non-users (hazard ratio [HR], 1.20; 95% confidence interval [CI], 1.14-1.26; p < 0.001). However, metformin users had a lower risk of all-cause mortality (HR, 0.78; 95% CI, 0.74-0.81; p < 0.001) and ESRD (HR, 0.44; 95% CI, 0.42-0.47; p < 0.001) during follow-up than non-users did. The relationships between metformin use and clinical outcomes remained consistent in propensity score matching analyses and subgroup analyses of patients with adequate adherence to anti-diabetes medication.

conclusionTreatment with metformin was associated with an increased risk of MACCE in patients with diabetes and CKD. However, metformin users had a lower risk of all-cause mortality and ESRD during follow-up than non-users did. Therefore, metformin needs to be carefully used in patients with CKD.

Indexed as

Chronic kidney diseaseMetforminMortalityRenal insufficiency

Identifiers

PMID34922433
PMCPMC8685353
OpenAlexW3215177882

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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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 OpenQuestion graph.