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Impacts of metformin on tuberculosis incidence and clinical outcomes in patients with diabetes: a systematic review and meta-analysis

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Abstract

Background

Accumulating evidence suggested that the use of metformin had more benefits for both prevention and treatment of tuberculosis (TB) than non-metformin use in patients with diabetes mellitus (DM); however, it remains to be fully elucidated on this topic. Thus, we conducted a systematic review and meta-analysis of published studies to determine the association between metformin use and TB in patients with diabetes.

Methods

The MEDLINE, EMBASE, Information Sciences Institute (ISI) Web of Science, and Cochrane CENTRAL databases were searched from their inception to 15 April 2019. Studies that evaluated the use of metformin and TB disease were included. The quality of each study was evaluated through the Newcastle-Ottawa Scale (NOS). For pooled data, the relative risk (RR) and 95% confidence intervals (CIs) were calculated; otherwise, a systematic review.

Results

Seventeen observational studies were included, all of which indicated a low risk of bias according to the NOS. The pooled analysis showed that metformin use was associated with a significantly lower active TB incidence and mortality among individuals with DM (RR = 0.51; 95% CI, 0.38–0.69, P ⩽ 0.001) and with TB-DM (RR = 0.34; 95% CI, 0.20–0.57, P ⩽ 0.001), respectively.

Conclusions

This meta-analysis indicated metformin use is related to benefits in both prevention and treatment outcomes of tuberculosis among patients with diabetes. Prospective clinical trials are needed to confirm these associations.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 81870015)

Authors’ contributions

ZM and HJQ both searched databases, selected studies, extracted data, analyzed data. ZM wrote the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jian-qing He.

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Zhang, M., He, Jq. Impacts of metformin on tuberculosis incidence and clinical outcomes in patients with diabetes: a systematic review and meta-analysis. Eur J Clin Pharmacol 76, 149–159 (2020). https://doi.org/10.1007/s00228-019-02786-y

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