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) | ||||||
|---|---|---|---|---|---|---|---|
| <0.08 | 0.08–0.16 | 0.17–0.31 | >0.31 | ||||
| 0–14 | 123 (34.7) | 108 (30.4) | 69 (19.4) | 55 (15.5) | |||
| 15–29 | 22 (10.0) | 37 (16.9) | 72 (32.9) | 88 (40.2) | |||
Data are n (%). P < 0.0001.