BackgroundThis study aimed to examine the relationship between Self-Care, Self-Efficacy, and Health Deviation Self-Care Requisites in patients with type 2 diabetes based on Orem’s Self-Care Theory.MethodsThe research involved 341 patients with type 2 diabetes in Rasht, Iran, using a descriptive-analytical cross-sectional design. The data collection included questionnaires assessing Self-Care Behaviors, Self-Efficacy, and Health Deviation Self-Care Requisites based on Orem’s model.ResultsDemographic factors such as gender, marital status, employment, education, age, duration of disease, and oral treatment and insulin had no consistent effect on self-care behaviors. Self-efficacy was a key factor influencing Self-Care Behaviors in diabetic patients. There was a strong and direct correlation between Self-Care Behaviors and Self-Efficacy, indicating the role of individuals’ confidence in managing diabetes. Health Deviation Self-Care Requisites had both positive and negative correlations with different domains of Self-Care Behaviors.The physical exercise construct of self-efficacy was the most significant predictor of Self-Care Behaviors.ConclusionsThis study provides valuable insights into the complex relationship between Self-Care, Self-Efficacy, and Health Deviation Self-Care Requisites in patients with type 2 diabetes. The findings underscore the importance of addressing Self-Efficacy and specific self-care domains, such as physical activity and foot care, in diabetes management strategies. This research contributes to the existing knowledge base and may inform healthcare professionals and policymakers in developing targeted interventions to improve self-care practices in diabetic patients.