The Diagnostic Value of Cervical Lymph Node Metastasis in Head and Neck Squamous Carcinoma by Using Diffusion-Weighted Magnetic Resonance Imaging and Computed Tomography Perfusion

Table 2

Accuracy of diffusion-weighted imaging (DWI) and perfusion CT (CTP).

	Sensitivity	Specificity	PPV	NPV	Accuracy	AUC
DWI	43/48 (89.58%)	13/17 (76.47%)	43/47 (91.49%)	13/18 (72.22%)	56/65 (86.15%)	0.830
CTP	33/48 (68.75%)	9/17 (52.94%)	33/41 (80.48%)	9/24 (37.50%)	42/65 (64.61%)	0.605

𝑍=4.612, 𝑃<0.001.
PPV = positive predictive value, NPV = negative predictive value, and AUC = area under the ROC curve.