Table 3. Multivariate Logistic Regression Models for the Variables Independently Associated with Subjects Who Ultimately Treated with Insulin: 0=Group IA (n=122), 1=Group IB and II (n=153).

Variables	Odds ratio (95% CI)	p value
Age (yr)	0.24 (0.96–1.01)	0.235
Sex (women=0, men=1)	1.54 (0.85–2.78)	0.154
BMI (kg/m2)	0.93 (0.84–1.02)	0.106
Duration of diabetes (yr)*	1.77 (0.71–4.41)	0.217
Fasting glucose (mg/dL)	1.00 (0.99–1.00)	0.517
HbA1c (%)	1.17 (0.92–1.49)	0.211
PCGR
Higher tertiles	Referent
Lowest tertile	2.22 (1.09–4.52)	0.029

BMI, body mass index; CI, confidence interval; PCGR, postprandial C-peptide-to-glucose ratio.

^*Duration of diabetes was log-transformed.