Outcomes of "diabetes-friendly" vs "diabetes-unfriendly" ß-blockers in older nursing home residents with diabetes after acute myocardial infarction.

Zullo AR, Hersey M, Lee Y, Sharmin S, Bosco E, Daiello LA, Shah NR, Mor V, Boscardin WJ, Berard-Collins CM, Dore DD, Steinman MA. Outcomes of "diabetes-friendly" vs "diabetes-unfriendly" ß-blockers in older nursing home residents with diabetes after acute myocardial infarction. Diabetes, Obesity & Metabolism. 2018 Dec 1; 20(12):2724-2732.

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Abstract:

AIMS: To assess whether nursing home (NH) residents with type 2 diabetes mellitus (T2D) preferentially received "T2D-friendly" (vs "T2D-unfriendly") ß-blockers after acute myocardial infarction (AMI), and to evaluate the comparative effects of the two groups of ß-blockers. MATERIALS AND METHODS: This new-user retrospective cohort study of NH residents with AMI from May 2007 to March 2010 used national data from the Minimum Data Set and Medicare system. T2D-friendly ß-blockers were those hypothesized to increase peripheral glucose uptake through vasodilation: carvedilol, nebivolol and labetalol. Primary outcomes were hospitalizations for hypoglycaemia and hyperglycaemia in the 90?days after AMI. Secondary outcomes were functional decline, death, all-cause re-hospitalization and fracture hospitalization. We compared outcomes using binomial and multinomial logistic regression models after propensity score matching. RESULTS: Of 2855 NH residents with T2D, 29% initiated a T2D-friendly ß-blocker vs 24% of 6098 without T2D (P? < 0.001). For primary outcomes among residents with T2D, T2D-friendly vs T2D-unfriendly ß-blockers were associated with a reduction in hospitalized hyperglycaemia (odds ratio [OR] 0.45, 95% confidence interval [CI] 0.21-0.97), but unassociated with hypoglycaemia (OR 2.05, 95% CI 0.82-5.10). For secondary outcomes, T2D-friendly ß-blockers were associated with a greater rate of re-hospitalization (OR 1.26, 95% CI 1.01-1.57), but not death (OR 1.06, 95% CI 0.85-1.32), functional decline (OR 0.91, 95% CI 0.70-1.19), or fracture (OR 1.69, 95% CI 0.40-7.08). CONCLUSIONS: In older NH residents with T2D, T2D-friendly ß-blocker use was associated with a lower rate of hospitalization for hyperglycaemia, but a higher rate of all-cause re-hospitalization.