Abstract
Background:
We hypothesized that the recommended incretin-mimetic therapy associates with a better outcome (1-year mortality after discharge, rehospitalizations within 12 months) and with less hypoglycemic events in type − 2 diabetics following myocardial revascularization.
Methods:
Hospitalized type-2 diabetics of the Departments of Cardiology and Cardiothoracic Surgery (University Hospital Halle), who had percutaneous coronary intervention (29.4%) or coronary artery bypass graft (70.6%) in 2016, were included in this observational study: Group 1 (incretin-mimetic therapy), Group 2 (insulin therapy without incretin mimetics) or Group 3 (oral diabetes medication without incretins or insulin). They were asked to mail in a questionnaire on medical therapy, number of hypoglycemic episodes and rehospitalizations 2 years following discharge. In non-responders, the vital status was obtained by local registries 2.4 years after discharge.
Results:
204 patients were recruited in this prospective observational study. At discharge, only 3.9% of all type-2 diabetics had an incretin mimetic, 39.7% were on insulin, and 56.4% on oral medication. In all patient groups together, the prevalence of incretin-mimetic therapy did not change (3.9% at discharge, 2.9% at follow-up). The prevalence of sodium glucose transporter-2–inhibitor therapy slightly increased from 6.8% at discharge to 9.2% at follow-up. However, 85 out of 173 patients (49.1%) did not provide follow-up questionnaires. In hospital mortality (Group 1: 0%, Group 2: 0%, Group 3: 5.2%; p = 0.092), 1-year mortality after discharge ( Group 1: 12.5%, Group 2: 13.6%, Group 3: 11.9%; p = 0.944), and number of rehospitalizations within 12 months after discharge (Group 1: 1.0 per capita, Group 2: 1.0, Group 3: 1.1; p = 0.697) were similar among groups. Hypoglycemic events 6 months prior to follow-up were highest in Group 2 (0.9 ± 2.3) in comparison to Group 1 (0 ± 0) and Group 3 (0.1 ± 0.3; p = 0.017).
Conclusion:
Even after adjusting for surviving patients not sending back questionnaires, the adherence to the recommendations regarding incretin-mimetic and sodium-glucose transporter-2–inhibitor therapy was poor. With the limitation of a low patient number, both 1-year mortality after discharge and rehospitalizations were similar among groups. Self-reported hypoglycemic events occurred more often in insulin-treated diabetics than in the ones without.