Table 1

Demographic characteristics of the study population of childhood-onset (<15 years of age) type 1 diabetes in Norway, followed for ESRD, mortality, and emigration, or until 30 November 2015

TotalMaleFemaleYear of diagnosis
1973–19821989–2012
Participants7,871 (100)4,242 (53.9)3,629 (46.1)1,888 (24.0)5,983 (76.0)
Age at diagnosis of type 1 diabetes, years8.8 (0.6–14.9)8.8 (0.6–14.9)8.7 (0.6–14.9)9.1 (0.6–14.9)8.7 (0.6–14.9)
Duration of diabetes, years18.8 (0–42.9)18.7 (0–42.9)18.8 (0–42.9)35.8 (0–42.9)13.4 (0–26.9)
Age at end of follow-up, years27.6 (1.8–57.5)27.6 (3.7–57.5)27.5 (1.8–57.0)44.8 (3.9–57.5)22.2 (1.8–41.6)
Follow-up, person-years147,71479,38168,33367,41180,303
Participants in whom ESRD developed103 (1.3)67 (1.6)36 (1.0)86 (4.6)17 (0.3)
Incidence rates of ESRD per 1,000 person-years (95% CI)0.69 (0.57–0.85)0.84 (0.66–1.07)0.52 (0.38–0.73)1.28 (1.03–1.58)0.53 (0.38–0.73)
Time from diagnosis of diabetes to ESRD, years25.9 (12.7–39.1)26.4 (14.1–39.1)24.8 (12.7–37.4)27.2 (16.5–39.1)18.9 (12.7–24.6)
Age at diagnosis of ESRD, years35.9 (22.1–48.3)36.5 (24.1–48.3)34.6 (22.1–45.8)37.0 (22.1–48.3)29.9 (22.4–38.7)
Dead285 (3.6)200 (4.7)85 (2.3)204 (10.8)81 (1.4)
Emigrated108 (1.4)48 (1.1)60 (1.7)26 (1.4)82 (1.4)
Deceased participants who had ESRD31 (10.9)22 (11.0)9 (10.6)27 (13.2)4 (4.9)
  • Data are n (%) or mean (range), unless otherwise indicated.