Table 2 Correspondence between the Kudo pit pattern classification (by narrow-band imaging (NBI)) and histopathology (the gold standard) of all detected lesions
NBI classificationHistopathologyTotal
Suspicious121628, PPV 43%
Non-suspicious46670, NPV 94%
Total16,sens. 75%82,spec. 81%98
  • Kudo pit pattern type I–II was considered as non-suspicious and Kudo type III–V as suspicious for neoplasia.

  • NPV, negative predictive value; PPV, positive predictive value; sens., sensitivity; spec., specificity.