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CLINICAL TRIAL, PHASE III
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL
RESEARCH SUPPORT, NON-U.S. GOV'T
Antihyperglycemic and Blood Pressure Effects of Empagliflozin in Black Patients With Type 2 Diabetes Mellitus and Hypertension.
Circulation 2019 April 31
BACKGROUND: Empagliflozin, a sodium-glucose cotransporter 2 inhibitor indicated for type 2 diabetes mellitus (T2DM), can lower blood pressure (BP) and reduce cardiovascular mortality in patients with T2DM and preexisting cardiovascular disease. Its effects in blacks have been understudied.
METHODS: In this 24-week study, 150 blacks with T2DM and hypertension had glycohemoglobin (primary end point), office and 24-hour ambulatory BP, body weight, and safety assessments. After a 2-week, open-label, placebo run-in, patients were randomly assigned to once daily empagliflozin (10 mg for the first 4 weeks, then force-titrated to 25 mg until week 24) or placebo. A mixed-effects model for repeated measures was performed on the primary and 2 key secondary end points, and an analysis of covariance for nonrepeated measures with last observation carried forward was performed for 2 other key secondary end points. Hierarchical testing was applied for these end points.
RESULTS: Overall, 52.7% of participants were men, mean (SD) age, 56.8 (9.3) years; mean duration of T2DM, 9.3 (7.1) years. The baseline values of key parameters (mean [SD]) were as follows: glycohemoglobin, 8.59 (1.02)%; ambulatory systolic BP, 146.3 (11.0) mm Hg; and ambulatory diastolic BP, 89.4 (8.1) mm Hg. By week 24, the mean (standard error) change in glycohemoglobin in the empagliflozin group was -0.77 (0.15%) in comparison with an increase of 0.07 (0.16%) in the placebo group; placebo-corrected difference, -0.78% (95% CI, -1.18 to -0.38; P=0.0002). Reductions in body weight by week 24 were -2.38 (0.38) empagliflozin and -0.80 (0.47) placebo; the placebo-corrected difference was -1.23 kg (95% CI, -2.39 to -0.07; P=0.0382). Empagliflozin significantly reduced 24-hour ambulatory systolic BP versus placebo by weeks 12 and 24 (placebo-corrected difference, -5.21 mm Hg [95% CI, -9.24 to -1.18; P=0.0117] and -8.39 mm Hg [95% CI, -13.74 to -3.04; P=0.0025], respectively). Diastolic BP was also reduced.
CONCLUSIONS: In blacks with T2DM, empagliflozin reduced glycohemoglobin, body weight, and BP. The effect of empagliflozin on BP increased from 12 to 24 weeks, suggesting a full antihypertensive effect takes ≥6 months to be fully realized. At week 24, the placebo-subtracted BP effect was similar to standard antihypertensive monotherapies, suggesting that empagliflozin may be beneficial for this high-risk population.
CLINICAL TRIAL REGISTRATION: URL: https://www.clinicaltrials.gov . Unique identifier: NCT02182830.
METHODS: In this 24-week study, 150 blacks with T2DM and hypertension had glycohemoglobin (primary end point), office and 24-hour ambulatory BP, body weight, and safety assessments. After a 2-week, open-label, placebo run-in, patients were randomly assigned to once daily empagliflozin (10 mg for the first 4 weeks, then force-titrated to 25 mg until week 24) or placebo. A mixed-effects model for repeated measures was performed on the primary and 2 key secondary end points, and an analysis of covariance for nonrepeated measures with last observation carried forward was performed for 2 other key secondary end points. Hierarchical testing was applied for these end points.
RESULTS: Overall, 52.7% of participants were men, mean (SD) age, 56.8 (9.3) years; mean duration of T2DM, 9.3 (7.1) years. The baseline values of key parameters (mean [SD]) were as follows: glycohemoglobin, 8.59 (1.02)%; ambulatory systolic BP, 146.3 (11.0) mm Hg; and ambulatory diastolic BP, 89.4 (8.1) mm Hg. By week 24, the mean (standard error) change in glycohemoglobin in the empagliflozin group was -0.77 (0.15%) in comparison with an increase of 0.07 (0.16%) in the placebo group; placebo-corrected difference, -0.78% (95% CI, -1.18 to -0.38; P=0.0002). Reductions in body weight by week 24 were -2.38 (0.38) empagliflozin and -0.80 (0.47) placebo; the placebo-corrected difference was -1.23 kg (95% CI, -2.39 to -0.07; P=0.0382). Empagliflozin significantly reduced 24-hour ambulatory systolic BP versus placebo by weeks 12 and 24 (placebo-corrected difference, -5.21 mm Hg [95% CI, -9.24 to -1.18; P=0.0117] and -8.39 mm Hg [95% CI, -13.74 to -3.04; P=0.0025], respectively). Diastolic BP was also reduced.
CONCLUSIONS: In blacks with T2DM, empagliflozin reduced glycohemoglobin, body weight, and BP. The effect of empagliflozin on BP increased from 12 to 24 weeks, suggesting a full antihypertensive effect takes ≥6 months to be fully realized. At week 24, the placebo-subtracted BP effect was similar to standard antihypertensive monotherapies, suggesting that empagliflozin may be beneficial for this high-risk population.
CLINICAL TRIAL REGISTRATION: URL: https://www.clinicaltrials.gov . Unique identifier: NCT02182830.
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