Following a doubling of the incidence and prevalence of diabetes in the U.S. from 1990-2008, new data suggest a plateauing of the rate between 2008 and 2012 for adults, however the incidence continued to increase in Hispanic and non-Hispanic black adults, according to a study in the September 24 issue of JAMA . Although there has been an increase in the prevalence and incidence of diabetes in the United States in recent decades, no studies have systematically examined long-term, national trends of this disease, according to background information in the article.