Table 1.

The Boston Bowel Preparation Scale (BBPS)

Segment score	Description
0	Unprepared colon segment with mucosa not seen due to solid stool that cannot be cleared
1	Portion of mucosa of the colon segment seen, but other areas of the colon segment not well seen due to staining, residual stool, and/or opaque liquid
2	Minor amount of residual staining, small fragments of stool and/or opaque liquid, but mucosa of the colon segment seen well
3	Entire mucosa of the colon segment seen well with no residual staining, small fragments of stool or opaque liquid