Table 7. Diagnostic values of the interpretation of the tracer uptake trend in late images from [^99mTc]Tc-Sestamibi (MIBI) scintigraphy.

Tracer uptake trend
Variables	TP	TN	FP	FN	TOT	SEN	SPE	PPV	NPV	ACC
Imaging Interpretation	(%)	(%)	(%)	(%)	(%)
Method U1	10	78	61	12	161	0.45	0.56	0.14	0.87	0.55
	(6.2)	(48.4)	(37.9)	(7.5)	(100)
Method U2	6	126	13	16	161	0.27	0.91	0.32	0.89	0.82
	(3.7)	(78.3)	(8.1)	(9.9)	(100)

Method U1: negative = decreased uptake, positive = increased or constant uptake.

Method U2: negative = decreased or constant uptake, positive = increased uptake.

TP = true positive, TN = true negative, FP = false positive, FN = false negative, TOT = total of valid cases, SEN = sensitivity, SPE = specificity, PPV = positive predictive value, NPV = negative predictive value, ACC = accuracy.

Bold values highlight the most important results.