Importance of OGTT for diagnosing diabetes mellitus based on prevalence and incidence of retinopathy

Abstract Study was made on the necessity and importance of the oral glucose tolerance test (OGTT) for diagnosing diabetes mellitus based on prevalence and incidence of diabetic retinopathy. Subjects were 12 208 persons undergoing OGTT between 1965 and 1997. The prevalence of retinopathy was significantly elevated with FPG≥126 and 2-h PG≥198 mg/dl. The incidence of retinopathy was 15–30/10 000 person-years (PY) with FPG