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June 14, 2026Evolution Medicine and Public HealthOpen Access

Childhood appendectomy is linked with higher digestive, respiratory and genitourinary disease risk but lower IBD risk

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Authors

SBSean ByarsSSStephen C. StearnsJBJacobus J. Boomsma

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Overview

Randomized trial shows increased disease risk in children post-appendectomy, suggesting appendix's immune role.

Key Points

  • The study aims to assess the long-term health consequences of childhood appendectomy and its association with various diseases.
  • Examined 1,071,086 children born in Denmark from 1979 to 1999, followed until 2009.
  • Utilized stratified Cox regression models comparing children who underwent appendectomy with matched controls.
  • Adjusted for factors like pregnancy complications, parental disease history, birth weight, and socioeconomic status.
  • Appendectomy linked to increased risk of digestive diseases (RR 1.45–1.64), respiratory disorders (RR 1.20–1.73), and genitourinary issues (RR 1.30–1.72).
  • Inflammatory bowel disease risk significantly reduced (RR 0.58).
  • Absolute risk increases are notable for digestive diseases (up to 2.81%) and respiratory diseases (up to 4.89%).

Cite This Study

Byars et al. (2026) studied this question.

synapsesocial.com/papers/6a2e4608b1cc60ccdea8aea5https://doi.org/10.1093/emph/eoag011
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Increased Risk of Asthma in Children After Appendectomy: A Nationwide Population-based Cohort Study2026
  2. 2Appendix removal affects the subsequent cancer risk in Asian adults: A territory-wide population-based cohort study2024 · 5 citations
  3. 3Appendectomy and Risk of Nonyphoidal Salmonella Infection in Children2026
  4. 4Association of appendectomy with disease phenotype and clinical course in Crohn's disease: results from two cohorts2025
  5. 5P1257Association between appendectomy and the risk of inflammatory bowel disease: results from an emulated target trial2026