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Network meta-analysis of cardiovascular outcomes in randomized controlled trials of new antidiabetic drugs

Yue Fei, Man-Fung Tsoi, Cyrus Rustam Kumana, Tommy Tsang Cheung, Bernard Man Yung Cheung
International Journal of Cardiology 2018 March 1, 254: 291-296

BACKGROUND: Randomized controlled trials (RCTs) directly comparing cardiovascular outcomes of new antidiabetic drugs are lacking. We used network meta-analysis to compare new antidiabetic drug classes with respect to major adverse cardiovascular events (MACE) and mortality.

METHODS: We searched MEDLINE, EMBASE, the Cochrane database, and up to 30 December 2016 for RCTs involving SGLT-2 inhibitors, glucagon-like peptide-1 receptor agonists (GLP-1 RAs) and dipeptidyl peptidase-4 (DPP-4) inhibitors in diabetic patients that reported MACE and deaths. Outcomes were compared with frequentist and Bayesian methods using R statistics.

RESULTS: Seven RCTs with altogether 62,268 patients were included in the network meta-analysis. The SGLT-2 inhibitor and GLP-1 RAs reduced MACE (OR 0.85, 95%CI 0.73-0.99 and 0.89, 0.82-0.97, respectively) and all-cause mortality (0.67, 0.55-0.81 and 0.89, 0.80-0.99, respectively) compared to placebo. Furthermore, the SGLT-2 inhibitor reduced all-cause mortality compared to GLP-1 RAs (0.76, 0.61-0.94). In contrast, DPP-4 inhibitors did not reduce MACE or mortality compared to placebo and were associated with higher all-cause mortality compared to the SGLT-2 inhibitor (1.53, 1.24-1.89) and GLP-1 RAs (1.16, 1.01-1.33).

CONCLUSIONS: All-cause mortality and MACE were reduced by the SGLT-2 inhibitor and GLP-1 RAs, but not DPP-4 inhibitors. The SGLT-2 inhibitor had the most beneficial impact on all-cause mortality. DPP-4 inhibitors showed no cardiovascular benefit and were inferior to the other two drug classes in preventing deaths.


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