Table 1

Composition and demographic characteristics of the EDC cohort by T1D diagnosis before and after 1965 at study entry (1986–1988)

Diabetes diagnosed in 1950–64 (n = 390)Diabetes diagnosed in 1965–80 (n = 542)P value
Cohort composition
 Predeceased33.1 (129)2.8 (15)<0.0001
 Survey only9.5 (37)17.2 (93)
 Examined57.4 (224)80.1 (434)
Age at T1D onset (years)8.0 (3.9)8.6 (4.0)0.02
Chronological age (years)33.0 (7.6)23.3 (5.6)<0.0001
Female sex45.9 (179)52.2 (283)0.06
Race/ethnicity
 Caucasian96.7 (376)96.9 (525)0.85
 African American3.3 (13)3.1 (17)
  • Data are mean (SD) or percent (n).