Narrow Band Imaging with Magnification Can Pick Up Esophageal Squamous Cell Carcinoma More Efficiently Than Lugol Chromoendoscopy in Patients after Chemoradiotherapy

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)  

	Sensitivity	Specificity	PPV	NPV	Accuracy
NBI with; magnification	100%	98.5%	85.7%	100%	98.6%

(b)  

	NBI with magnification	Lugol chromoendoscopy	𝑃 value
PPV	85.7%	8.3%	𝑃<0.0001

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