Table 4.

Color differences between areas with and without atrophy and between regions with and without intestinal metaplasia.

Finding		GIF-1200N Endoscope	GIF-290N Endoscope		GIF-1200N Endoscope	GIF-290N Endoscope
		WLI	WLI	p-Value	NBI	NBI	p-Value
Atrophy	ΔL*	5.8 ± 11.0	5.7 ± 7.9	0.954	12.3 ± 13.0	5.6 ± 11.5	0.030
	Δa*	−6.0 ± 4.7	−8.8 ± 7.3	0.015	−1.6 ± 10.3	5.5 ± 6.5	0.002
	Δb*	−0.6 ± 3.0	−2.4 ± 4.1	0.012	2.0 ± 3.7	2.3 ± 2.9	0.733
	ΔE*	13.4 ± 6.4	15.0 ± 4.8	0.133	19.2 ± 8.5	14.4 ± 6.2	0.001
Intestinal metaplasia	ΔL*	2.2 ± 4.7	3.3 ± 4.9	0.034	5.0 ± 6.7	3.0 ± 8.5	0.388
	Δa*	−0.6 ± 5.3	−2.5 ± 6.0	0.076	−9.3 ± 5.8	−9.0 ± 5.0	0.819
	Δb*	−0.5 ± 2.7	−1.7 ± 3.3	0.043	−2.3 ± 3.6	−2.9 ± 2.0	0.415
	ΔE*	7.1 ± 3.3	6.9 ± 3.1	0.738	13.7 ± 4.2	13.3 ± 4.4	0.760

Abbreviations: WLI: white-light imaging, ΔL*: change in brightness, Δa*: change in red-green component, Δb*: change in yellow-blue component, ΔE: color difference; * p < 0.05. Bold meant data with p < 0.05 with significant different.