Diagnosis underlying appendectomy and coeliac disease risk

Area of Science:

• Gastroenterology and immunology research.
• Epidemiological studies on autoimmune diseases and surgical interventions.

Background:

• Appendectomy has been linked to reduced risk of inflammatory bowel diseases like ulcerative colitis, especially with acute appendicitis.
• Previous research on appendectomy and coeliac disease (CD) is inconsistent, lacking differentiation by appendectomy diagnosis.
• This study addresses the need for clarity on the association between appendectomy indications and CD risk.

Purpose of the Study:

• To investigate the relationship between the diagnosis underlying appendectomy and the risk of coeliac disease.
• To clarify inconsistent findings in prior research by analyzing appendectomy indications.

Main Methods:

• Utilized Swedish National Registers (1964-2003) with over 14,000 individuals with CD and 68,000 referents.
• Employed Cox regression to assess appendectomy risk in CD patients and conditional logistic regression for CD risk post-appendectomy.
• Categorized appendectomies into perforated appendicitis, non-perforated appendicitis, and appendectomy without appendicitis.

Main Results:

• Coeliac disease showed a negative association with perforated appendicitis (HR=0.78).
• No significant association was found between CD and non-perforated appendicitis (HR=1.11).
• Appendectomy without appendicitis was positively associated with CD (HR=1.58), regardless of condition timing.

Conclusions:

• Perforated appendicitis is negatively associated with coeliac disease, irrespective of when each condition occurs.
• Coeliac disease is associated with an increased risk of undergoing appendectomy without a diagnosis of appendicitis.
• Findings highlight the importance of considering the underlying diagnosis for appendectomy when evaluating its association with coeliac disease.