Review of small-bowel cleansing scales in capsule endoscopy: A panoply of choices

Table 1 Computer dependent scales

Ref.	Computer or human dependent	Capsule endoscopy system	Type of preparation	Qualitative/quantitative scale	Reproducibility	Parameters evaluated	Entire video, segments of video or consecutive single frames	Time-consuming	Easy to perform1	Global assessment2
Van Weyenberg et al[6]	Computer dependent	PillCam	2 L of PEG	Quantitative	r = 1.0	Mean intensity values of the green and red channels of the small-bowel segment of the tissue colour bar	Tissue colour bar	No	ΔΔΔΔΔ	ΔΔΔΔ
Ponte et al[10]	Computer dependent	MiroCam	Clear liquid diet and overnight fast	Quantitative	r = 1.0	Mean intensity values of the green and red channels of the small-bowel segment of the tissue colour bar	Map view bar	No	ΔΔΔΔΔ	ΔΔΔΔ
Klein et al[8]	Computer dependent	PillCam	Clear liquid diet and overnight fast	Quantitative	Kappa = 0.9	Pixels of the small-bowel segment of the tissue colour bar	Tissue colour bar	No	ΔΔΔΔΔ	ΔΔΔΔ

¹Graduation from Δ to ΔΔΔΔΔ, with higher classifications corresponding to easier scales;

²Graduation from Δ to ΔΔΔΔΔ, with higher classifications corresponding to better scales. PEG: Polyethylene glycol.