Table 4: (a) Diagnostic ability of the NBI with magnification in detecting esophageal SCC and HGIN. (b) Comparison of PPV of NBI with magnification and Lugol chromoendoscopy.
(a)

SensitivitySpecificityPPVNPVAccuracy

NBI with
magnification
100%98.5%85.7%100%98.6%

(b)

NBI with magnificationLugol chromoendoscopy value

PPV85.7%8.3%

NBI: narrow band imaging, SCC: squamous cell carcinoma, HGIN: high-grade intraepithelial neoplasia, PPV: positive predictive value, NPV: negative predictive value.