Secular changes in U.S. prediabetes prevalence defined by hemoglobin a1c and fasting plasma glucose: national health and nutrition examination surveys, 1999-2010.

Diabetes Care 2013;36:2286-93

Bullard KM, Saydah SH, Imperatore G, Cowie CC, Gregg EW, Geiss LS, Cheng YJ, Rolka DB, Williams DE, Caspersen CJ