Of the original 103,898 members within the Hawaii subset of the MEC, 10,028 (9.7%) subjects who reported a diagnosis of diabetes at baseline (Table 1) and 10 subjects who had missing information were excluded from the incidence analysis (Fig. 1). Subjects who indicated having diabetes at any point after baseline or who were classified as case subjects by one of the health plans were considered incident at the time of the first report. Individuals who never reported diabetes and who were not identified as diabetic patients by the health plans were categorized as noncase subjects. As described above, data on diabetes status were available at three subsequent time points from four different sources: the FuQx, the MedQx, and the linkage with the BCBS and KP health plans. Of the 86,732 participants who completed the FuQx, 9,964 (11.5%) indicated diabetes. At the time of the MedQx, 4,425 (11.1%) of the 39,787 subjects reported use of diabetes medications. Finally, of the 88,004 MEC subjects linked with the BCBS plan, 11,375 were identified as diabetic case subjects (16.9% of estimated BCBS members, i.e., 88,004 minus 20,539 KP members), while 20,539 (23.3%) MEC subjects were identified as KP members of whom 4,003 (19.5%) were diabetic case subjects.