Effective use of the Japan Narrow Band Imaging Expert Team classification based on diagnostic performance and confidence level

Table 6 Comparison with Narrow Band Imaging International Colorectal Endoscopic classification

Diagnosis	Neoplasia vs non neoplasia1		Deep submucosal invasive cancer vs other neoplasia2
Classification	JNET	NICE[5]	JNET	NICE[6]
Overall, n	5891	236	4825	400
Accuracy, %	91.3	89	96.8	90
Sensitivity, %	99.0	98	51.0	92
Specificity, %	56.2	69	99.1	88
PPV, %	91.2	87	74.5	88
NPV, %	92.2	95	97.6	92
High confidence rate, %	93.1	75	92.9	50

¹Neoplasia vs non neoplasia; JNET 1 vs 2A,2B and NICE 1 vs 2.

²Deep submucosal invasive cancer vs other neoplasia; JNET 2A,2B vs 3 and NICE 2 vs 3. PPV: Positive predictive value; NPV: Negative predictive value; JNET: Japan Narrow Band Imaging Expert Team; NICE: Narrow Band Imaging International Colorectal Endoscopic.