Risk factors for delayed colonic post-polypectomy bleeding: a systematic review and meta-analysis

Area of Science:

• Gastroenterology
• Endoscopic Surgery
• Clinical Epidemiology

Background:

• Delayed post-polypectomy bleeding (PPB) is a rare but significant complication following colonoscopic polypectomy.
• Identifying reliable risk factors for delayed PPB is crucial for patient safety and management.
• Previous studies have yielded inconsistent results regarding PPB risk factors.

Purpose of the Study:

• To conduct a meta-analysis to identify significant risk factors associated with delayed post-polypectomy bleeding.
• To consolidate evidence from multiple studies to provide a clearer understanding of PPB predictors.

Main Methods:

• A systematic literature search was performed on MEDLINE and EMBASE databases up to January 2016.
• Included studies investigated risk factors for delayed PPB.
• Pooled odds ratios and mean differences were calculated using a random-effect model, with heterogeneity assessed by Q statistic and I-squared.

Main Results:

• Twelve studies comprising 14,313 patients were analyzed.
• The overall pooled rate of delayed PPB was 1.5%.
• Significant risk factors identified were cardiovascular disease (OR=1.55), hypertension (OR=1.53), polyp size >10 mm (OR=3.41), and right colon polyp location (OR=1.60).

Conclusions:

• Cardiovascular disease, hypertension, larger polyp size, and right-sided colon location are associated with an increased risk of delayed PPB.
• Increased vigilance is recommended when performing polypectomies in patients with these identified risk factors.
• Further research is needed to establish optimal preventive hemostatic strategies for high-risk patients.