TABLE 2

Demographic characteristics of Allegheny County Type 1 Diabetes Registry population by diagnosis cohort as of 1 January 2008

Diagnosis cohortOverall
1965–19691970–19741975–1979
n3553913291,075
Vital status confirmed96.6 (343)97.4 (381)97.0 (319)97.0 (1,043)
Deceased37.2 (132)23.5 (92)16.7 (55)*26.0 (279)
Male50.4 (179)54.5 (213)50.5 (166)51.9 (558)
Caucasian92.4 (328)93.6 (366)91.8 (302)92.7 (996)
Age at diabetes diagnosis10.5 ± 4.410.8 ± 4.011.4 ± 4.0*10.9 ± 4.2
Mean diabetes duration34.6 ± 9.032.2 ± 7.328.9 ± 4.7*32.0 ± 7.6
Mean age45.1 ± 9.242.9 ± 7.840.3 ± 5.9*42.9 ± 8.0
Person-years of follow-up12,277.612,584.89,500.734,363.1
  • Data are % (n) or means ± SD.

  • *P ≤ 0.01 for either χ2 or ANOVA across diagnosis cohort groups.

  • †Type 1 diabetes duration and age at death or last follow-up.