Update on screening for type 2 diabetes - The why, who, how, and what of testing and diagnosing

Diabetes mellitus, a leading cause of death in the United States, remains u ndiagnosed in more than 5 million people. While screening for this disease is key to reducing its complications, morbidity and mortality, the recommen dations for identifying and testing at-risk populations are debatable. This article summarizes the competing guidelines for screening for type 2 diabe tes and offers insight on the different diagnostic methods and tools availa ble.