Aims/Introduction: We examined secular trends in the prevalence of type 2 diabetes and prediabetes in community-dwelling Japanese subjects. Materials and Methods: A total of 2,490 subjects in 1988 and 2,852 subjects in 2002 aged 40–79 years underwent a 75-g oral glucose tolerance test, and their glucose tolerance status was defined by the 1998 World Health Organization criteria. Results: The …