Table 2. Cutoff values of Vancouver scar scale for predicting stenosis recurrence following two different types of operation for treating for vesicourethral anastomotic stenosis.

	Dilatation using Amplatz renal dilators	Endoscopic bladder neck incision and/or resection
Cutoff value	6.5	3.5
Sensitivity (%)	87.3	93.3
Specificity (%)	84.6	80.8
Positive predictive value (%)	85.0	82.9
Negative predictive value (%)	86.9	92.3
Area under receiver operating characteristic curve	0.920	0.949
P	< 0.001*	< 0.001*

^*P < 0.05; Asterisk (*) indicates statistical significance.