Table 2.

The Boston Bowel Preparation Scale.

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