Table 1: Ottawa Bowel Preparation Quality Scale.

Quality of preparationScore

Individual evaluation of right, mid, and left colon
 No liquid0
 Minimal liquid, no suctioning required1
 Suction required to see mucosa2
 Wash and suction3
 Solid stool, not washable4
Evaluation of the entire colon
 Overall quantity of fluid0–2

Total Ottawa score (0–14) is obtained by adding the scores for individual evaluation of the right, mid, and left colon with the score of overall fluid in the entire colon.