Three-year mortality in diabetic patients treated with different combinations of insulin secretagogues and metformin
Abstract
BACKGROUND: Several studies have shown an increase of mortality in diabetic patients treated with combinations of sulphonylureas and biguanides. Comparisons between different insulin secretagogues in combination with metformin with respect to all-cause mortality have not been reported so far.
METHODS: An observational cohort study was performed on a consecutive series of 2002 outpatients with type 2 diabetes mellitus. Of these patients, 696 (34.8%) were receiving combinations of insulin secretagogues and biguanides at enrollment. Three-year mortality was assessed through research in the City of Florence Registry Office.
RESULTS: During follow-up, 295 deaths were recorded. Among patients on combined secretagogue and biguanide treatment, glibenclamide was associated with a significantly higher yearly mortality (8.7%) than repaglinide (3.1%; p = 0.002), gliclazide (2.1%; p = 0.001), and glimepiride (0.4%; p < 0.0001). After adjusting for potential confounders (including age; duration of diabetes; Body Mass Index (BMI); lipid profile; HbA(1c); insulin treatment; metformin doses; Charlson co-morbidity score; CCS), mortality remained significantly higher in patients treated with combinations of glibenclamide and metformin when compared to those treated with different insulin secretagogues (OR with 95% CI: 2.09 [1.07;4.11]).
CONCLUSIONS: In the present study, sulphonylureas with greater selectivity for beta-cell receptors, such as glimepiride and gliclazide, were associated with a…
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Evidence Hub reads this as a cohort study, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence.
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