Background: Diabetes mellitus is a common and dangerous disease. Current methods in our country are not effective in the management of diabetes mellitus. The main object of our study is to design and test an effective model in the management of diabetes mellitus.

Materials and methods : Grounded theory research used for designing the heory, 30 adults patients with their families, physicians, nurses, and dietitians were interviewed. The data were analyzed according to the Straus and Corbin method. The effect of designed theory on glycemic control was assessed during a randomized clinical trial on 104 diabetics referring to the Iranian Diabetes Association in 1382.

Results : In qualitative part, 395 open codes were clustered in 27 subcategories and 9 main categories. Later on, the model shaped with defining the process and relationships between the categories. Personal system cure, care, and support system as well as social system are the main 3 systems that their interaction will determine the outcomes like glycemic control which is the most important indicator of diabetics. 3 months followed by model-based interventions, the mean of HbA1c was reduced form 8.22±2 to 6.7±1.6 in the intervention group. (p<0.02)

Conclusion : Outcome based management revealed to control effectively the blood glucose level.