Diabetes mellitus is a group of common metabolic disorders that share the hypoglycemia phenotype. Many cases of DM2 are caused by the interaction of genetic factors with environmental ones. The lack of metabolic regulation in DM2 causes secondary pathophysiologic changes in multiple systems that represent an overload for the individual and for the health system in general. (1) Glycosylated hemoglobin allows us to evaluate the patient’s metabolic control in the last 3 months and it also allows us to predict the probable complications. Objectives: To determine with serum glycosylated hemoglobin’s values, the percentage of patients that reach a metabolic control after at least 6 months of treatment, so as, to explore the relation between the BMI and HbA1C values. The relation between the patients’ knowledge about the disease and the glycemic control was determined. Other objectives were to determine differences in HbA1C values depending on the drug treatment the patient was on and also the relationship between the patient’s level of education and the HbA1C values. Finally, we measured the relationship between insulin use and a higher BMI. Methods: Descriptive,
transversal study. Glycosylated hemoglobin was measured in 392 patients, 306 public patients and 86 private. Patients were interviewed to evaluate their general knowledge about their disease, their level of education and their treatment. Patients were also measured and weighted to calculate their body mass index. The American Diabetes Association (ADA) guidelines suggest an HbA1C value of ≤ 7% for an adequate metabolic control. The patients were classified according to that value. Results: Only 88 (22%) of the 392 patients achieved the therapeutic goal established by the ADA, 22 were private (25%) and 66 (21%) were public patients. Conclusions: Only 22% of the type 2 diabetic patients with more than 6 months of treatment did achieve the therapeutic goal. Private patients have a better control of diabetes than public patients do. There is no relationship between the patient’s HbA1C values and the following variables: patient’s knowledge about the disease, patient’s level of education and body mass index. There are no differences between the treatments used for diabetes control.