Split-Dose Polyethylene Glycol Is Superior to Single Dose for Colonoscopy Preparation: Results of a Randomized Controlled Trial

Figure 3

Bowel preparation quality for AM (earlier than 10:00 AM) and PM (after 10:00 AM) procedures. All single-dose patients took their bowel preparation (4 L PEG) the day before the colonoscopy starting at noon for AM procedures and 6:00 PM for PM procedures. Split-dose patients took the second dose the evening before colonoscopy for AM procedures, or 5 hours before the colonoscopy time for PM procedures.