Despite advances in bowel preparation methods,bowel preparation is inadequate in up to one-third of all colonoscopies in reported series.Inadequate bowel cleansing results in negative consequences for the examination, including incomplete visualisation of the colon, missed lesions, procedural difficulties, prolonged procedure time and reduced time interval until follow-up, and an estimated 12-22% increase in overall colonoscopy cost.~The adequacy of a bowel preparation is closely linked to patient compliance with both dietary and purge instructions.One study performed in Asia showed that non-compliance with bowel preparation instructions, lower education level, and a long wait for the colonoscopy appointment were independent risk factors for poor bowel preparation. Another study performed in China showed that telephone re-education（TRE) about the details of bowel preparation on the day before colonoscopy significantly improved the quality of bowel preparation and PDR. So,it is reasonable to hypothesise that efforts to improve education and maximise patient compliance during the preparatory period will enhance the efficacy of bowel preparation.~The study compares the efficacy of bowel preparation between the face-to-face re-education (FFRE group) and telephone re-education (TRE group) in patients.
The study compares the efficacy of bowel preparation between the face-to-face re-education(FFRE group) and normal education (no-FFRE group) in patients.