Table 2:

Diagnostic accuracy of MR imaging and CT in evaluating bone invasion

	TP	TN	FP	FN	Sensitivity	Specificity	PPV	NPV	Accuracy
	No. of Cases				%
Mandibular cortical invasion
MR imaging	24	14	12	1	96	54^*	67	93	74
CT	25	23	3	0	100	88^*	89	100	94
Bone marrow involvement
MR imaging	24	21	5	1	96	81	83	95	88
CT	25	23	3	0	100	88	89	100	94
Inferior alveolar canal involvement
MR imaging	5	32	14	0	100	70^†	26	100	73
CT	5	44	2	0	100	96^†	71	100	96

Note:—TP indicates true-positive; TN, true-negative; FP, false-positive; FN, false-negative; PPV, positive predictive value; NPV, negative predictive value.
* P = .004;
† P = .002 (McNemar test).