Table 3.

ROC curves to determine cutoff values of each indicator for withdrawal from insulin therapy.

Parameter	AUC	p value	Cut-off	Sensitivity	Specificity	Odd ratios
Fasting blood glucose (mg/dL)	0.60675	n.s	141.0	80.0	55.6	0.997
Fasting C-peptide (ng/mL)	0.59167	n.s	1.00	85.7	36.1	1.299
Fasting C-peptide index	0.60873	n.s	0.56	100.0	25.0	1.753
Blood glucose after glucagon loading (mg/dL)	0.61746	n.s	155.0	77.1	58.3	0.996
C-peptide after glucagon loading (ng/mL)	0.66508	<0.05	2.30	77.1	58.3	1.486
C-peptide index after glucagon loading	0.69286	<0.05	1.25	91.4	52.8	2.152
ΔCPR (ng/mL)	0.70476	<0.05	1.00	77.1	66.7	2.888
HOMA-β (%)	0.64315	n.s	14.8	84.4	54.8	1.023
SUIT	0.63810	n.s	25.6	77.1	55.6	1.012
24-hour urine C-peptide (μg/day)	0.54167	n.s	35.6	65.7	58.3	0.999

ΔCPR, delta C-peptide; HOMA-β, homeostatic model assessment beta cell function; SUIT, secretory unit of islet transplantation.

NS, Not Significant.