Improved visibility of colorectal tumor by texture and color enhancement imaging with indigo carmine

Table 4 Visibility scores of margin and surface of serrated polyps for white light imaging, texture and color enhancement imaging, chromoendoscopy and texture and color enhancement imaging + chromoendoscopy

	WLI	TXI	CE	TXI + CE	WLI vs TXI, P value	TXI vs CE, P value	CE vs TXI + CE, P value
Margine, mean (SD)	2.29 (1.05)	2.73 (1.03)	3.23 (0.75)	3.63 (0.56)	< 0.05	< 0.05	< 0.01
Surface, mean (SD)	2.11 (0.86)	2.69 (0.89)	3.01 (0.75)	3.41 (0.66)	< 0.001	NS	< 0.01

The visibility score was defined as follows: Score 4, excellent (easily detectable); score 3, good (detectable without careful observation); score 2, fair (hardly detectable without careful examination); score 1, (not detectable without repeated careful examination). NS: Not significant; WLI: White light imaging; TXI: Texture and color enhancement imaging; CE: Chromoendoscopy; TXI + CE: Texture and color enhancement imaging + chromoendoscopy.