Background: Effective performance of diabetes self-care behaviors in type 2 diabetes (T2D) isrncrucial for improving glycemic control and managing diabetes-related comorbidities includingrnheart failure (HF). Compared to persons without T2D those with T2D have 2-3 fold higherrnincidence of comorbid HF which often result in increased morbidity and poorer survival. Little isrnknown, however, about the correlates of diabetes self-care behaviors and outcomes in peoplernwith T2D and comorbid HF. rnObjective: The purpose of this secondary analysis study was to provide a deeper conceptualrnunderstanding of the correlates of diabetes self-care behaviors in adults with T2D and comorbid rnHF. rnMethods: Baseline data of 180 participants from a randomized clinical trial that tested a 6-monthrnintegrated self-care intervention for adult persons with comorbid HF and T2D were analyzed.rnStudy-developed data extraction forms and a battery of standardized instruments were used torncollect demographic, clinical, and psychosocial data from medical records and self-report.rnDiabetes self-care behaviors were measured using the Summary of Diabetes Self-Care Activitiesrn(SDSCA). Glycated hemoglobin (HbA1c) and fasting blood glucose (FBG) were analyzed fromrnwhole blood sample at baseline. Correlational bivariate, multiple logistic regression andrnhierarchical linear regression analysis were performed to examine associations and predictors ofrndiabetes self-care behaviors and glycemic control. The IBM SPSS for Windows version 24 wasrnused to analyze the data. rn Result: The participants mean age was 58.1Â±10.7 years and the majority were male (n = 118,rn65.6%) and African American (n = 119, 66.1%). Good self-rated health and presence of anrnimplantable cardioverter defibrillator (p < 0.01) predicted better diabetes self-efficacy whilerntaking both oral antiglycemic medication and insulin, history of depression, cardiac pacemaker,rnand digitalis (p < 0.05) predicted lower diabetes self-efficacy. Number of comorbidities >2rn(p