Introduction: Type I diabetes is the most common chronic diseases of childhood and adolescence. Long-term and short-term complications of the disease affects the patient's ability for self-care behaviors that. Given that a factor affecting self-care behaviors in patients with diabetes, this study aimed to evaluate the efficacy and some related factors in adolescents with type I diabetes were studied.

Methodology: The present cross-sectional study was performed on adolescents with diabetes. 100 adolescents with diabetes were selected by census method. Demographic information questionnaire  and Diabetes Management Self-Efficacy Scale(DMSES) were applied to obtain data.to analyze the data, in addition to descriptive Statistics, Independent t and multivariate regression analysis were performed using spss18.

Results: Average score adolescents with diabetes self-efficacy was 91/68±21/06. Between self-efficacy scores were statistically significant differences between male and female adolescents (p=0.04). Pearson test showed a direct relationship between blood glucose control component with age (p=0.005), sex (p=0.006) and education (p=0.002). Also There was a significant relationship between Medical care component with Birth rank (p=0.002), age(p=0.000), duration of illness (p=0.007), education (p=0.01). Multivariate regression analysis showed that only gender had the ability to predict self-care behaviors (p=0.04).

Conclusion: Sex is one of the factors affecting self-efficacy in adolescents with diabetes and Predicts self-care behaviors. The Birth rank can affect the self-efficacy of adolescents in medical care component.