2.3. Endpoints
MINOR, SECONDARY, COMPLICATIONS
The primary outcome was to evaluate the effect of probiotic pretreatment on the alteration and recovery of gut microbiota after bowel preparation for colonoscopy. In addition, the secondary outcomes were to assess the effect of probiotic pretreatment on the occurrence of minor complications after colonoscopy and to determine which microbiome plays an important role in the colonization at the early stage after bowel preparation.