Table 3—

Quartiles of fasting C-peptide levels, by age at onset of diabetes, in incident cases of type 1 diabetes in the province of Turin, Italy, from 1984 to 2000

Age at onset (years)Fasting C-peptide (nmol/l)
<0.080.08–0.160.17–0.31>0.31
0–14123 (34.7)108 (30.4)69 (19.4)55 (15.5)
15–2922 (10.0)37 (16.9)72 (32.9)88 (40.2)
  • Data are n (%). P < 0.0001.