Table 2. Pixel brightness for red, green and blue color was calculated for WLE, BLI and LCI images.

Pixel brightness	Location	WLE (n = 44)	BLI (n = 44)	LCI (n = 44)	P value for LCI vs. WLE	P value for LCI vs. BLI
Red color (R)	Lesion	198.329 ± 25.376	144.438 ± 33.109	202.973 ± 26.348	0.261	0.000
	Normal mucosa	182.403 ± 44.221	149.577 ± 48.509	199.354 ± 35.644	0.001	0.000
Green color (G)	Lesion	104.605 ± 17.974	141.644 ± 194.993	128.36 ± 24.553	0.000	0.646
	Normal mucosa	104.961 ± 26.975	115.971 ± 40.339	137.221 ± 32.581	0.000	0.001
Blue color (B)	Lesion	74.726 ± 16.721	87.505 ± 30.214	126.630 ± 23.568	0.000	0.000
	Normal mucosa	75.952 ± 22.754	87.511 ± 35.963	129.045 ± 30.562	0.000	0.000
R/(G + B)	Lesion	1.134 ± 0.196	0.731 ± 0.148	0.812 ± 0.140	0.000	0.002
	Normal mucosa	1.027 ± 0.150	0.758 ± 0.128	0.760 ± 0.093	0.000	0.889