Evidence map›Paper›PMID 35228620›Full record

ArticleScientific reports2022

Metformin use and the risk of bacterial pneumonia in patients with type 2 diabetes.

Fu-Shun Yen, James Cheng-Chung Wei, Ying-Hsiu Shih, Chih-Cheng Hsu, Chii-Min Hwu

Open access · goldFull text read
In one paragraph

Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
2.4field-weighted citation impact, top 10% 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

14 citing papers in PubMed, 18 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Review
  5. Article
  6. 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
  7. Review
  8. Review
  9. Diabetes Mellitus and Pneumococcal Pneumonia.Diagnostics (Basel, Switzerland) · 2024
    Review
  10. Article
  11. Article
  12. Article
  13. Sulfonylurea Use in Patients with Type 2 Diabetes and COPD: A Nationwide Population-Based Cohort Study.International journal of environmental research and public health · 2022
    Article
  14. Article
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

5 authors at 4 institutions in 1 country.

Fu-Shun YenDr. Yen's Clinic, Taoyüan, 271, Taiwan.
James Cheng-Chung WeiDivision of Allergy, Immunology and Rheumatology, Chung Shan Medical University Hospital, Taichung City, 402, Taiwan.
Ying-Hsiu ShihManagement Office for Health Data, China Medical University Hospital, Taichung, 404, Taiwan.
Chih-Cheng HsuInstitute of Population Health Sciences, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli County, 35053, Taiwan. cch@nhri.edu.tw.
Chii-Min HwuFaculty of Medicine, National Yang-Ming Chiao Tung University School of Medicine, No. 155, Sec. 2, Linong Street, Taipei, 11221, Taiwan. chhwu@vghtpe.gov.tw.
China Medical University Hospital · TWChung Shan Medical University Hospital · TWNational Health Research Institutes · TWNational Yang Ming Chiao Tung University · TW

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Persons with type 2 diabetes (T2D) have neutrophil dysfunction with a higher risk of infection than those without diabetes. We conducted this study aiming to compare the risk of pneumonia between metformin use and nonuse in persons with T2D. We identified 49,012 propensity score-matched metformin users and nonusers from Taiwan's National Health Insurance Research Database between January 1, 2000, and December 31, 2017. We used the Cox proportional hazards model to compare the risks of pneumonia and respiratory death. The mean (SD) age of the participants was 57.46 (12.88) years, and the mean follow-up time for metformin users and nonusers was 5.47 (3.71) years and 5.15 (3.87) years, respectively. Compared with the nonuse of metformin, the adjusted hazard ratios (95% CI) for metformin use in bacterial pneumonia, invasive mechanical ventilation, and respiratory cause of death were 0.89 (0.84-0.94), 0.77 (0.73-0.82), and 0.64 (0.56-0.74), respectively. A longer cumulative duration of metformin use had further lower adjusted hazard ratios in these risks compared with nonuse. In patients with T2D, metformin use was associated with significantly lower risks of bacterial pneumonia, invasive mechanical ventilation, and respiratory cause of death; moreover, longer metformin use duration was associated with lower hazard ratios of these risks.

Indexed as

Diabetes Mellitus, Type 2MetforminPneumonia, BacterialHumansHypoglycemic AgentsIncidenceMiddle AgedProportional Hazards ModelsRetrospective StudiesRisk FactorsTaiwanHypoglycemic AgentsMetformin

Identifiers

PMID35228620
PMCPMC8885662
OpenAlexW4214629787

What OpenQuestion holds

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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.