Age-Related Trends in the Prevalence of Type 2 Diabetes among Japanese and White and Black American Adults.

The prevalence of high HA1c in Tokyo almost rivals white Americans, but those statistics are dwarfed by the 37% of Afr-Amer adults identified with Type 2 diabetes. Elevated HA1c was more common in men, reflecting central adiposity, but poor glycemic control was also widespread among overweight Afr-Amer women. Type 2 diabetes was higher among older Japanese, when more women succumb. Overall, the findings highlight the societal and clinical challenges posed by demographic trends in both countries.