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.
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Bowel preparation quality
Timeframe: The BBPS scores were filled out by the treating physician in the designated area on the patient's examination request form and were collected and organized by the research team immediately after the end of the day's clinic
comfort
Timeframe: Patients self-evaluated their comfort level during the bowel preparation process after it was completed
tolerability
Timeframe: Patients finished the tolerability evaluation by themselves after completing bowel preparation and before being sent to the endoscopy center