Low-volume plus ascorbic acid vs high-volume plus simethicone bowel preparation before colonoscopy

Table 3 Colonoscopy preparation assessments

Aronchick scale
1 Excellent	Small volume of clear liquid or greater than 95% of surface seen
2 Good	Large volume of clear liquid covering 5% to 25% of surface but greater than 90% of surface seen
3 Fair	Some semi-solid stool that could be suctioned or washed away but greater than 90% of surface seen
4 Poor	Semi-solid stool that could not be suctioned or washed away and less than 90% of surface seen
5 Inadequate	Repreparation needed
Residual stool score (total in sum of three score)
Amount of residual stool	0 = none
	1 = small
	2 = moderate
	3 = large
Consistency of residual stool	0 = none
	1 = clear liquid
	2 = colored liquid
	3 = stool particles
	4 = semi-solid stool
	5 = solid stool
Percent bowel wall visualized	0 ≥ 75%
	1 = 50%-75%
	2 = 25%-49%
	3 ≤ 25%