Overall acceptability and efficacy of commonly used bowel preparations for colonoscopy in Italian clinical practice. A multicentre prospective study

Fabrizio Raffaello Parente, Alessandro Repici, Cristiano Crosta, Livio Cipolletta, Pier Alberto Testoni, Guido Costamagna, Angelo Andriulli, Giovanni Di Matteo, Remo Sassatelli, Silvano Gallus

Research output: Contribution to journalArticle


Background & aims: The recent enormous increase in colonoscopy demand prompted this multicentre observational study assessing overall acceptability and efficacy of commonly used bowel preparations in Italian clinical practice. Methods: Consecutive outpatients undergoing colonoscopy were recruited from 9 major gastroenterological centres in Italy. Each patient evaluated overall acceptability of the bowel cleansing preparation through a 0-100. mm Visual Analogue Scale. The Visual Analogue Scale score was dichotomized by a median split: 80-100 (high acceptability) vs. 0-79 (low acceptability). Bowel cleansing was assessed through a validated scale. The influence of potential individual determinants on patients' acceptability and cleansing efficacy of the bowel preparations was determined by multivariate analyses. Results: 599 evaluable patients were enrolled; 57.3% received 4L-PEG preparations, 29.5% 2L-PEG preparations and 13.2% 2-glasses-solutions (Na-phosphate/Mg-citrate/Na-picosulphate-containing preparations). Overall acceptability was significantly higher for 2L-PEG and 2-glasses solutions than 4L-PEG (adjusted odds ratio, 4.72; and adjusted odds ratio 2.07, respectively). Successful bowel cleansing achieved with 4L-PEG (85.9%) was similar to 2L-PEG (85.3%; adjusted odds ratio 0.82) and significantly higher than 2-glasses solutions (69.6%; adjusted odds ratio 0.34 vs. 4L-PEG). Split regimen, lower total preparation volume and colonoscopy reason (periodical control vs. 1st procedure) were significantly associated with high acceptability. Age ≥60 years, dissatisfaction with the preparation taken, and ≤4/week bowel movements were major determinants of a poor bowel cleansing. Conclusions: 2L-PEG and 4L-PEG preparations provide the most effective bowel cleansing for colonoscopy in clinical practice, with a significantly higher acceptability for 2L-PEG preparations.

Original languageEnglish
Pages (from-to)795-802
Number of pages8
JournalDigestive and Liver Disease
Issue number9
Publication statusPublished - 2014



  • Acceptability
  • Bowel cleansing preparations
  • Cleansing efficacy
  • Colonoscopy

ASJC Scopus subject areas

  • Gastroenterology
  • Hepatology
  • Medicine(all)

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