Table 1.

Study Participant Characteristics

Characteristic	n, % (n = 25 759)
Gender, female	12 895 (50%)
Age, y, mean ± SD	23.0 ± 16.9
<6	1275 (5%)
6 to <13	6962 (27%)
13 to <18	6321 (25%)
18 to <26	3877 (15%)
26 to <50	4479 (17%)
50 to <65	2145 (8%)
≥65	700 (3%)
Diabetes duration, y, mean ± SD	10.6 ± 11.8
Age of diagnosis of T1D, y, mean ± SD	11.6 ± 10.6
<18	21 528 (84%)
≥18	4231 (16%)
Race/ethnicity
White non-Hispanic	21 141 (82%)
Black non-Hispanic	1314 (5%)
Hispanic or Latino	2049 (8%)
Asian/Pacific Islander	344 (1%)
Native American	91 (<1%)
More than one race	721 (3%)
Participants with coexisting AIDs	6819 (26%)