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Cholecystectomy Is a Risk Factor for Microscopic Colitis: A Nationwide Population-based Matched Case Control Study
David Bergman1, Fahim Ebrahim2, Jiangwei Sun1
1Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Summary
Cholecystectomy, a gallbladder removal surgery, is linked to a higher risk of developing microscopic colitis (MC). This study suggests a connection between bile acid issues and MC development.
Area of Science:
- Gastroenterology
- Coloproctology
- Epidemiology
Background:
- Bile acid malabsorption is associated with microscopic colitis (MC).
- Some MC patients respond to bile acid sequestrant therapy.
- The link between cholecystectomy and MC risk is not well-established.
Purpose of the Study:
- To investigate the association between cholecystectomy and the risk of developing microscopic colitis (MC).
- To provide nationwide data on the relationship between prior cholecystectomy and subsequent MC diagnosis.
Main Methods:
- A nationwide matched case-control study in Sweden (1981-2017).
- Included 13,554 MC patients and 64,886 matched controls.
- Utilized Swedish pathology and national patient registers; analyzed cholecystectomy data.
Main Results:
- Patients with MC had a significantly higher rate of prior cholecystectomy (2.5% vs. 1.1%).
- Cholecystectomy was associated with an adjusted odds ratio (aOR) of 2.36 for MC.
- Increased risk observed for both collagenous colitis (aOR 1.87) and lymphocytic colitis (aOR 2.65).
Conclusions:
- Cholecystectomy is a significant risk factor for developing microscopic colitis.
- Findings highlight the role of bile acid dysregulation in MC pathogenesis.
- Implications for surgical and primary care practices regarding MC risk assessment.
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