The Role of Narrow Band Imaging in the Detection of Recurrent Laryngeal and Hypopharyngeal Cancer after Curative Radiotherapy

Table 5

Sensitivity, specificity, positive (PPV) and negative (NPV) predictive value, and accuracy of the outpatient NBI videoendoscopy and WL and NBI magnifying endoscopy.

	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)	Accuracy (%)
Outpatient videoendoscopy with NBI	88	92	76	96	91
WL + NBI magnifying endoscopy	100	92	79	100	94