The increase in the prevalence of type 2 diabetes mellitus poses a challenge in the management of long-term diseases. The ability of patients to consistently manage their own care is primarily determined by self-efficacy. This study aims to analyze the relationship between self-efficacy and self-management in patients with type 2 diabetes mellitus. The study uses a quantitative, correlational, cross-sectional design. A total of 59 patients with type 2 diabetes mellitus were selected through purposive sampling, based on inclusion and exclusion criteria. Data collection was conducted using a self-efficacy questionnaire and the Diabetes Self-Management Questionnaire to measure patients' self-care behaviors. Data analysis was performed using Spearman's correlation test. The findings showed a significant, moderate positive relationship between self-efficacy and self-management. The results indicate that patients with higher self-efficacy tend to have better self-management abilities. Strengthening self-efficacy in nursing interventions and diabetes education programs is an important part of supporting the sustainability of self-care behaviors and improving patient health outcomes.
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