Abstract
Background and study aims Effective bowel cleansing is critical
for detecting lesions during colonoscopy, highlighting the importance of bowel preparations.
1L polyethylene glycol (PEG) + ...ascorbate (Asc) is the only recommended 1L PEG product in
Europe and the United States. Its efficacy was demonstrated in large-scale controlled trials
and confirmed in smaller-scale real-world studies. However, no large-scale real-world data
exist.
Patients and methods This observational, retrospective,
multicenter study, used outpatient follow-up data from medical records from 10 centers in
Spain and two in Portugal. Outpatients aged ≥18 years using 1L PEG + Asc as bowel preparation
were included. The main outcome measures were overall adequate colon cleansing (Boston Bowel
Preparation Scale BBPS score ≥6 with BBPS score ≥2 in each segment) and high-quality
cleansing of the right colon (BBPS score=3).
Results Data from 13169 eligible patients were included. Overall
cleansing success was achieved in 89.3% (95%CI 88.7%-89.8%) and high-quality cleansing in the
right colon in 49.3% (95%CI 48.4%–50.2%) of patients. For the overnight split-dose and
same-day regimens, overall adequate quality cleansing success rate was 94.7% and 86.7% (P<0.0001) and high-quality cleansing of the right colon rate was
65.4% and 41.4% (P<0.0001), respectively. Colonoscopy was
completed in 97.3% of patients, with non-completion due to poor preparation in only 0.8%; 2.3%
of patients experienced at least one adverse event (AE).
Conclusions This large-scale, real-world study demonstrates the
effectiveness of 1L PEG + Asc in the total and right colon, with a low percentage of patients
with AEs in routine clinical practice.
