Bile pigment in small-bowel water content may reflect bowel habits: a retrospective analysis of a capsule endoscopy imaging series

Table 2 Color differences between the small-bowel water content of constipation and diarrhea patients and normal-bowel-habit patients

	Defecation phenotype
	Constipation	Diarrhea
Conventional images
ΔE (color difference) compared with normal-bowel-habit	12.4	11.2
NBS unit	11.4	10.3
Rating by NBS evaluation criteria^a	Much	Much
FICE setting 1 images
ΔE (color difference) compared with normal-bowel-habit	4.4	3.3
NBS unit	4.0	3.0
Rating by NBS evaluation criteria^a	Appreciable	Noticeable

Abbreviations: FICE flexible spectral imaging color enhancement, NBS National Bureau of Standards
^a NBS classification: 0–0.5, trace; 0.5–1.5, slight; 1.5–3.0, noticeable; 3.0–6.0, appreciable; 6.0–12.0, much; 12.0 and above, very much

ISSN: 1471-230X