120
Participants
Start Date
April 1, 2023
Primary Completion Date
December 31, 2026
Study Completion Date
December 31, 2026
Dietary Fiber
Given PO
Proctoscopy or anoscopy with Biopsy
Undergo proctoscopy or anoscopy
Colonoscopy
Undergo Colonoscopy
Questionnaire Administration
Ancillary studies
RECRUITING
OHSU Knight Cancer Institute, Portland
OHSU Knight Cancer Institute
OTHER