Uncontrolled diabetes is a major health problem in Thailand. The objective of this study was to determine the effects of a diabetes self-management program on glycemic control, coronary heart disease (CHD) risk, and quality of life in 147 diabetic patients (aged 56.8 +/- 10.2 years). Type 2 diabetic patients who met the research criteria were randomized into two groups for a period of 6 months: the experimental group received the diabetes self-management program and the control group received the usual nursing care. The findings indicated that the experimental group demonstrated a significant decrease in the hemoglobin A(1c) level and CHD risk, with an increase in quality of life (QOL) compared to the control group. The diabetes self-management program was effective for improving metabolic control and the QOL for individuals with diabetes. Further studies should be replicated using larger groups over a longer time frame.