This is a single-center, prospective, endoscopist-blinded study in which hospitalized patients scheduled to undergo diagnostic colonoscopy were randomly assigned to receive one gallon of PEG either the morning of colonoscopy or as a split-dose (evening-morning). The primary end point is efficacy of colonoscopy preparation measured by the Ottawa scale. The investigators pre-specified a non-inferiority margin of 1.5 for the difference in Ottawa scale between arms. Secondary end points are patient compliance and tolerance. N: 120 hospitalized patients scheduled for diagnostic colonoscopy.
