Table 2—

C-peptide values of initial and confirmatory diabetic OGTTs

C-peptide (ng/ml)
P value
First OGTTConfirmatory OGTT
Fasting1.5 (0.7, 2.1)1.2 (0.8, 1.7)0.054
30 min2.6 (1.9, 4.0)2.2 (1.6, 3.5)0.001
60 min3.1 (2.1, 4.5)2.7 (1.9, 3.8)<0.001
90 min3.6 (2.3, 5.3)3.0 (2.1, 4.3)0.001
120 min3.5 (2.5, 5.5)3.2 (2.1, 5.0)0.004
Peak3.8 (2.7, 5.9)3.2 (2.2, 5.0)<0.001
AUC (2-h)350 (249, 501)309 (212, 443)<0.001
  • Data are medians (25th, 75th percentiles). n = 63.