A sampling of 1,652 subjects in 1999 and 1,214 subjects in 2002 who are over 60 years old in southwest area of Seoul were investigated. All subjects underwent a 75 g oral glucose tolerance test (OGTT), biochemical study and anthropometric measurements. Among the 1,652 subjects in 1999, 350 subjects were followed up for 3 years and 294 subjects without diabetes at baseline examination participated in retrospective cohort study.
RESULTS:
Prevalence of diabetes in 1999 was 20.5% [previous diagnosed people (11.9%), newly diagnosed people (8.6%)] and in 2002 was 22.1% [previous diagnosed people (15.2%), newly diagnosed people (6.9%)]. Prevalence of impaired fastingglucose (IFG) or impaired glucose intolerance (IGT) was 22.8% in 1999 and 27.8% in 2002. In 350 subjects were followed up for 3 years, prevalence of diabetes was 16.0% in 1999 and increased to 23.4% in 2002 (p=0.014). In retrospective cohort study, the annual incidence rate of diabetes was 2.9% (age and sex adjusted rate 2.5%).