Comparison of Split-dose and Single-dose Bowel Preparation Regimens Using Polyethylene Glycol Electrolyte(PEG)

The goal of this quasi-experimental study was to compare the effect of single-dose and split-dose 3L compound polyethylene glycol electrolyte powder (PEG) regimen on the quality, comfort and tolerability of bowel preparation in patients who would undergo colonoscopy examination or treatment. Participants in group A received a split-dose 3L PEG regimen, with 1L PEG taken on the night before the colonoscopy and 2L PEG taken 4-6 hours before the procedure. Participants in group B received a single-dose 3L PEG taken 4-6 hours before the colonoscopy.