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  • Title: Cardiovascular effects of dipeptidyl peptidase-4 inhibitor in diabetic patients with and without established cardiovascular disease: a meta-analysis and systematic review.
    Author: Xu S, Zhang X, Tang L, Zhang F, Tong N.
    Journal: Postgrad Med; 2017 Mar; 129(2):205-215. PubMed ID: 27813442.
    Abstract:
    OBJECTIVES: We aim to conduct a meta-analysis, by stratifying diabetic patients with or without clinical cardiovascular diseases (CVD), to explore whether there are different cardiovascular effects of dipeptidyl peptidase-4 inhibitors (DPP-4is) on these two different classes of diabetic patients. METHODS: We searchedMedline,Embase, theCochrane Libraryand ClinicalTrials.gov for relevant randomized controlled trials (RCTs). The included trials are divided into CVD (+) trials (subjects with established CVD), and CVD (-) trials (subjects with no CVD). We use all-cause mortality and cardiovascular outcomes as primary endpoints. RESULTS: (1) Three CVD (+) trials were included and 36,895 subjects were enrolled with a mean follow-up duration of 127.1 weeks. The pooled results showed that DPP-4is treatment, compared with the placebo, did not significantly affect all-cause mortality (RR, 1.03; 95% CI, 0.95 to 1.11), cardiovascular death (1.01, 0.91 to 1.12), myocardial infarction (0.98, 0.88 to 1.08) or stroke (1.02, 0.88 to 1.18) in diabetic patients with coexisting CVD history; however, it significantly increased the risk of heart failure (1.14, 1.01 to 1.27) in this population. 2) Thirty-five CVD (-) trials were included, and 29,600 patients were enrolled with a mean follow-up duration of 77.8 weeks. The analysis comparing DPP-4is with the placebo control showed that DPP-4is treatment did not significantly affect the risk of all-cause mortality or cardiovascular outcomes in diabetic patients free of CVD history. However, when compared with the active control, the pooling data showed that DPP-4is had a significant reduction on the risk of stroke (0.58, 0.34 to 0.99) but did not significantly affect the risk of all-cause mortality and other cardiovascular outcomes. CONCLUSION: DPP-4is may have no cardiovascular protective effects in diabetic patients with coexisting CVD, while there is a lack of definitive evidence supporting the cardiovascular benefits of DPP-4is treatment among diabetic patients free of CVD history.
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