The Impact of Telephone and Short Message System Based Education on Bowel Preparation for Colonoscopy

The investigational, or experimental arm, will receive standard written instructions on preparing for a colonoscopy plus intervention such as telephone based re-education by one investigator on the day before colonoscopy.

The investigational, or experimental arm, will receive standard written instructions on preparing for a colonoscopy plus intervention such as short message system based re-education by one investigator on the day before colonoscopy.