 1. Background Complications of diabetes could cause death from stroke and myocardial infarction, and it is the chronic disease that leads to foot amputation, blindness and renal failure. According to the data of Statistics Korea, the prevalence rate of diabetes for people over 30 years old standardization has gradually increased from 8.6 in 2001 to 9.7 in 2010. Although diabetes is not the direct cause of death or disability, it is becoming a significant health problem across the world as it is a major illness causing complications. 