Table 2.

a & b Contingency table and Classification Performance of Serum UCH-L1 in detecting Intracranial Lesions on CT and Contingency table and Classification Performance of Serum UCH-L1 in detecting Neurosurgical Intervention

2a.
	CT positive	CT negative		Sensitivity	100% (88–100)
UCH-L1 positive ≥0.09 ng/ml	28	61		Specificity	21% (13–32)
UCH-L1 negative <0.09 ng/ml	0	16		NPV	100% (76–100)
				PPV	31% (22–42)
2b.
	Neurosurgical Intervention	No Neurosurgical Intervention		Sensitivity	100% (73–100)
UCH-L1 positive ≥0.21 ng/ml	14	39		Specificity	57% (46–67)
UCH-L1 negative <0.21 ng/ml	0	52		NPV	100% (91–100)
				PPV	26% (16–41)