Table 4—

Age-adjusted fasting and stimulated C-peptide levels, by markers of β-cell autoimmunity, in incident cases of type 1 diabetes in the province of Turin, Italy, from 1984 to 2000

Fasting C-peptide [nmol/l (95% CI)]Stimulated C-peptide [nmol/l (95% CI)]
ICA−0.13 (0.10–0.16)0.43 (0.35–0.52)
ICA+0.10 (0.15–0.26)0.27 (0.22–0.32)
    P0.140.01
GADA−0.17 (0.13–0.22)0.31 (0.24–0.40)
GADA+0.15 (0.12–0.18)0.34 (0.28–0.40)
    P0.170.91
IA2−0.20 (0.14–0.29)0.42 (0.32–0.54)
IA2+0.13 (0.10–0.18)0.32 (0.25–0.41)
    P0.430.42