Table 3. Summary of Diagnostic Accuracy of Pre-Treatment ADC Value in Predicting Locoregional Failure in HNSCC.

Study	Total	TP	FP	FN	TN	Sensitivity	Specificity
Hatakenaka et al., 2011 (30) (prospective group)	17	8	1	0	8	1.00	0.89
Hatakenaka et al., 2011 (30) (validation set)	40	12	1	1	26	0.92	0.96
Kim et al., 2009 (28)	33	5	4	2	22	0.71	0.85
Marzi et al., 2017 (25)	34	7	5	3	19	0.70	0.79
Lombardi et al., 2017 (26)	47	7	5	7	28	0.50	0.85

ADC = apparent diffusion coefficient, FN = false negative, FP = false positive, HNSCC = head and neck squamous cell carcinoma, TN = true negative, TP = true positive