Table 4. Comparison of PPV and NPV between the BLI and NBI groups in the matched cohort.

PPV, % (95 % CI)
JNET	BLI group	NBI group	P value
Type 1	90.6 (74.9–98.0)	96.2 (80.3–99.9)	0.620
Type 2A	94.3 (91.5–96.3)	94.6 (91.9–96.5)	0.879
Type 2B	57.7 (36.9–76.6)	42.3 (23.3–63.0)	0.406
Type 3	100 (96.3–100)	91.7 (61.5–99.7)	1
PPV, % (95 % CI)
JNET	BLI group	NBI group	P value
Type 1	97.0 (94.8–98.4)	96.9 (94.7–98.2)	1
Type 2A	88.1 (77.8–94.7)	82.8 (71.3–91.0)	0.461
Type 2B	98.0 (96.1–99.0)	98.2 (96.4–99.2)	1
Type 3	98.5 (96.9–99.3)	98.7 (97.1–99.5)	1

JNET,Japan Narrow-band Imaging Expert Team; BLI, blue laser imaging; NBI, narrow-band imaging.