1L- vs. 4L-PEG for Bowel Preparation Among Inpatients.

1L- vs. 4L-Polyethylene Glycol for Bowel Preparation Before Colonoscopy Among Inpatients: a Propensity Score-matching Analysis.

Background and aims: Inpatients are at high risk for inadequate colon cleansing. Experts recommend 4L-polyethylene-glycol (PEG) solution because of its effectiveness and safety profile. A higher colon cleansing adequacy rate for a hyperosmolar 1L-PEG plus ascorbate prep has been recently reported in an observational study among more than 1,000 inpatients. Thus, the present study is aimed at determining whether 1L-PEG outperforms 4L-PEG among inpatients, through a propensity score-matching between the two groups in order to correct for confounders.

Inclusion Criteria:

• Adult inpatients scheduled for colonoscopy for any indication within the normal process of care.

Exclusion Criteria:

• patients who underwent emergency or elective therapeutic colonoscopies (e.g. polypectomy, endoscopic mucosal resection, endoscopic submucosal dissection)
• patients who underwent bowel preparation outside the hospital