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Saxagliptin efficacy and safety in patients with type 2 diabetes mellitus stratified by cardiovascular disease history and cardiovascular risk factors: analysis of 3 clinical trials.

AbstractOBJECTIVE:
To test the effectiveness and safety of saxagliptin 5 mg/d in patients with type 2 diabetes mellitus (T2DM) with and without history of cardiovascular disease (CVD) or cardiovascular (CV) risk factors.
METHODS:
The authors conducted a post hoc analysis of data from 3 randomized studies that compared saxagliptin versus placebo as initial combination therapy with metformin for 24 weeks (N = 648) and versus placebo as an add-on to insulin with and without metformin for 24 weeks (N = 455), and assessed noninferiority to glipizide as an add-on to metformin for 52 weeks (N = 858). Efficacy outcomes were the adjusted mean change from baseline in glycated hemoglobin (HbA1c) level, fasting plasma glucose concentration, and body weight and the proportion of patients achieving an HbA1c level < 7%. Pairwise comparisons were performed in subgroups with 1) history/no history of CVD, 2) ≥ 2 versus 0 to 1 CV risk factors, 3) hypertension/no hypertension, and 4) statin use/no statin use. Adverse events (AE) and hypoglycemia were monitored.
RESULTS:
In the initial combination therapy study, reductions in HbA1c level from baseline were greater with saxagliptin versus placebo in all subgroups (difference [saxagliptin - placebo], -0.38% to -0.67%). In the add-on to insulin ± metformin study, differences in adjusted mean change in HbA1c level versus placebo ranged from -0.23% to -0.58% across subgroups. In the noninferiority to glipizide study, adjusted mean changes in HbA1c level were comparable between saxagliptin and glipizide, across subgroups (difference, 0.08%-0.21%). No evidence suggested clinically relevant treatment-by-subgroup interactions in pairwise comparison. Incidences of ≥ 1 AE were comparable across subgroups. Incidences of confirmed hypoglycemia with saxagliptin were 0 in both metformin add-on studies and 1.2% to 7.8% with saxagliptin + insulin ± metformin.
CONCLUSION:
In patients with T2DM, saxagliptin 5 mg/d was similarly effective in improving glycemic control, with an AE profile similar to that of placebo, irrespective of CVD history, number of CV risk factors, hypertension, or statin use.
TRIAL REGISTRATION:
www.ClinicalTrials.gov identifiers: NCT00327015, NCT00575588, NCT00757588.
AuthorsWilliam Cook, Gianmaria Minervini, Brian Bryzinski, Boaz Hirshberg
JournalPostgraduate medicine (Postgrad Med) Vol. 126 Issue 6 Pg. 19-32 (Oct 2014) ISSN: 1941-9260 [Electronic] United States
PMID25414932 (Publication Type: Clinical Trial, Phase III, Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
Chemical References
  • Blood Glucose
  • Dipeptides
  • Dipeptidyl-Peptidase IV Inhibitors
  • Hemoglobin A, Glycosylated
  • Hypoglycemic Agents
  • Insulin
  • Metformin
  • saxagliptin
  • Adamantane
  • Glipizide
Topics
  • Adamantane (adverse effects, analogs & derivatives, therapeutic use)
  • Adult
  • Blood Glucose (metabolism)
  • Body Weight
  • Cardiovascular Diseases (complications)
  • Diabetes Mellitus, Type 2 (blood, complications, drug therapy)
  • Dipeptides (adverse effects, therapeutic use)
  • Dipeptidyl-Peptidase IV Inhibitors (adverse effects, therapeutic use)
  • Drug Therapy, Combination
  • Fasting
  • Glipizide (therapeutic use)
  • Hemoglobin A, Glycosylated (metabolism)
  • Humans
  • Hypoglycemia (chemically induced)
  • Hypoglycemic Agents (therapeutic use)
  • Insulin (therapeutic use)
  • Metformin (therapeutic use)
  • Risk Factors

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