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Survival and hospitalization in heart failure patients with or without diabetes treated with beta-blockers.

BACKGROUND
Physicians are still concerned about prescribing beta-blockers in diabetic patients with heart failure.


METHODS
In the outcome research study (the Beta-Blockers in Patients With Congestive Heart Failure: Guided Use in Clinical Practice [BRING-UP] study), the responsible clinicians could decide whether to start beta-blocker treatment and which agent to use. A total of 3091 patients were enrolled by 202 cardiologic centers: 25% of the recruited patients were already on beta-blockers, 28% started treatment at the enrollment visit, and 47% were not started on beta-blockers.


RESULTS
The 1-year mortality, hospitalization rate, and the combined end point of mortality or hospitalization were higher in diabetic patients (15.8% versus 10.9%; relative risk [RR] = 1.44; 95% confidence intervals [CI] 1.16-1.78, P =.001) (31.0% versus 24.0%; RR = 1.28; 95% CI 1.11-1.49; P =.0009) (40.5% versus 30.1%; RR = 1.35; 95% CI 1.19-1.51; P =.0001). The event-free analysis of the 4 groups (diabetic patients not treated with beta-blockers, diabetic patients treated with beta-blockers, nondiabetic patients not treated with beta-blockers, nondiabetic patients treated with beta-blockers) showed that patients treated with beta-blockers had a higher event-free probability than patients not treated with beta-blockers regardless the presence of diabetes (P <.0001).


CONCLUSIONS
On the basis of post hoc analysis, diabetic patients with chronic heart failure benefit from beta-blockers even if at a lower degree. Thus, there are no justifications to avoid beta-blockers in heart failure patients in the presence of diabetes.