Participants were asked about diabetes status at every research clinic visit, except Visit 2. All of the data in this section is based on self-report. For diabetes medications based on review of medications brought to research clinic visits, see the Medications data group. For biological measures of diabetes, including fasting and post-challenge plasma glucose levels, see the Labs data group. Fasting glucose levels were obtained at Visit 1 through Visit 10; 2hr oral glucose tolerance tests were performed at Visit 4 and Visit 7.