Table 2—

Clinical, metabolic, and immunological features at diabetes onset in the population-based cohort of incident cases of type 1 diabetes in the province of Turin, Italy, from 1984 to 2000

Age-group (years)Glucose (mmol/l)KetonuriaHospital admissionFasting C-peptide (nmol/l)Stimulated C-peptide (nmol/l)ICA+GADA+IA2+
n842769947575180262254183
0–424.9 ± 8.390 (96.8)102 (99.0)0.070.1411 (64.7)10 (58.8)8 (66.7)
5–922.9 ± 11.3146 (90.7)174 (98.9)0.080.1933 (64.7)30 (58.82)31 (81.6)
10–1421.9 ± 8.6179 (93.7)200 (88.5)0.150.2728 (59.6)26 (54.2)21 (65.6)
15–1924.1 ± 10.795 (88.0)114 (74.5)0.210.4823 (53.5)27 (64.3)11 (44.0)
20–2423.4 ± 10.696 (90.6)94 (61.4)0.230.4830 (47.6)41 (71.9)18 (51.4)
25–2921.1 ± 10.293 (84.6)83 (61.0)0.240.4319 (46.3)26 (66.7)10 (50.0)
    P0.04*0.03<0.0001<0.0001*<0.0001*0.340.500.003
0–1422.9 ± 9.6415 (93.3)476 (94.3)0.100.2172 (62.6)66 (56.9)60 (73.2)
15–2922.8 ± 10.6284 (87.6)291 (65.8)0.230.4772 (49.0)94 (68.1)39 (48.7)
    P0.890.008<0.0001<0.0001<0.0010.0280.060.001
  • Data are means ± SD, geometric means, or n (%).

  • *

    * Based on linear regression analysis;

  • based on Student’s t test.