An Examination of Factors Affecting Bowel Preparation for Colonoscopy: A Meta-Analysis.
Meng Yu, Bin Cao, Hongyun Wei and 3 others
PMID 41566605WHAT IT FOUND
Patients with chronic constipation, diabetes, or who used opioids were far more likely to have inadequate bowel prep.
A non-watery last stool and a delay over five hours before the procedure also strongly predicted poor cleansing.
Key findings
01Chronic constipation, diabetes, and opioid use were independent factors significantly associated with inadequate bowel preparation.
02A last bowel movement that was not watery and an interval of more than five hours between the final dose and the procedure were strong predictors of poor preparation quality.
03Older age (65 years and above) and male gender were also associated with a higher likelihood of inadequate bowel preparation.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
Most included studies were cross-sectional, which limits the ability to establish causality. There was significant heterogeneity in how bowel preparation quality was defined and measured across studies. Definitions for factors like 'high-fiber diet' and 'chronic constipation' varied between studies. The review was limited to English and Chinese literature, potentially excluding relevant studies from other regions.
The easy way to misread this
Do not assume these factors prove that changing them will definitely improve preparation quality. Most studies were cross-sectional, so they show association, not causation. Additionally, the large heterogeneity in study designs and definitions means these odds ratios should be interpreted with care in individual clinical decision-making.