Table 2.

Paired-sample t test for RGB pixel brightness in the cancer area and the noncancer area.

	Red	Green	Blue
Cancer area	190.24 ± 37.10	117.96 ± 33.91	114.36 ± 34.88
Noncancer area	160.00 ± 40.35	105.33 ± 30.01	90.93 ± 30.14
t	5.396	2.143	4.495
P value	<0.001	0.039	<0.001