Sodium‐glucose co‐transporter‐2 (SGLT‐2) inhibitors and cancer: A meta‐analysis of randomized controlled trials
AIM: The aim of this meta-analysis of randomized trials was to assess the effects of SGLT-2i on the overall incidence of malignancies and on different types of cancer, summerizing the results of trials with a duration of at least 1 year. This was done in light of the effect of SGLT-2 inhibitors (SGLT-2is) that has been highlighted by some studies, showing an increased incidence of bladder cancer, particularly with use of empagliflozin. MATERIALS AND METHODS: A Medline and Embase search for "Canaglifozin", "Dapaglifozin", "Empaglifozin", "Ertuglifozin", "Ipraglifozin", Tofoglifozin" or "Luseoglifozin" was performed, identifying randomized trials with a duration of more than 52 weeks up to 1 December 2018 that compared SGLT-2is with placebo or active comparators. The outcomes considered were all types of cancer and several site-specific cancers (ie, breast, pulmonary, gastrointestinal, hepatic, pancreatic, skin, prostate and bladder). Mantel-Haenszel odds ratios with 95% Confidence Intervals (MH-OR, 95% CI) were calculated for all outcomes. RESULTS: A total of 27 trials fulfilled the inclusion criteria. Retrieved trials had enrolled 27 744 and 20 441 patients in SGLT-2 inhibitor and comparator groups, respectively. No difference was observed in the incidence of all malignancies between patients allocated to SGLT-2i and comparators (MH-OR 0.98[0.77-1.24]). The incidence of bladder cancer, and of any other type of cancer, was not significantly increased by treatment with any SGLT-2i. CONCLUSIONS: Available data from randomized trials do not suggest a detrimental effect of SGLT-2is on the incidence of malignancies in general, or in bladder cancer in particular.