Table 3.

Contingency table and diagnostic accuracy on per-patient analysis over a total of 30 patients (a) and on a per-region analysis over a total of 174 anatomical lymph nodal regions (b) according to preoperative 99mTc-PSMA-I&S SPECT/CT results

	Pathology positive	Pathology negative
a)
99mTc-PSMA-I&S SPECT/CT positive	5	1
99mTc-PSMA-I&S SPECT/CT negative	4	20
Sensitivity	55% (21–86%)
Specificity	95% (83–100%)
Positive Predictive Value	83% (48–100%)
Negative Predictive Value	83% (63–95%)
Accuracy	83% (68–96%)
b)
99mTc-PSMA-I&S SPECT/CT positive	12	3
99mTc-PSMA-I&S SPECT/CT negative	10	149
Sensitivity	54% (28–72%)
Specificity	98% (93–99%)
Positive Predictive Value	80% (48–93%)
Negative Predictive Value	93% (88–96%)
Accuracy	92% (86–95%)