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Childhood appendectomy is linked with higher digestive, respiratory, and genitourinary disease risk but lower
Sean G Byars1,2, Stephen C Stearns3, Jacobus J Boomsma2
1School of Translational Medicine, The Alfred Centre, Monash University, Melbourne, Australia.
Insights
Childhood appendectomy increases long-term risks for digestive, respiratory, and genitourinary diseases, challenging the notion of the appendix being functionally redundant. However, it was linked to a reduced risk of inflammatory bowel disease (IBD).
Area of Science:
- Pediatric surgery
- Immunology
- Gastroenterology
Background:
- Appendectomy is a common pediatric surgery.
- The appendix's role in gut biofilm and immune function is under investigation.
- Long-term health effects of childhood appendectomy are not fully understood.
Purpose of the Study:
- To examine the association between appendectomy before age 12 and subsequent disease risk.
- To investigate potential long-term health consequences of childhood appendectomy.
Main Methods:
- Population-based cohort study of over 1 million Danish children (1979-2009).
- Linked national registers for follow-up until age 30.
- Stratified Cox regression models comparing appendectomy patients with matched controls, adjusting for confounders.
Main Results:
- Childhood appendectomy was linked to increased risks of digestive (RR 1.45-1.64), respiratory (RR 1.20-1.73), and genitourinary disorders (RR 1.30-1.72).
- Absolute risk increases were up to 2.81% for digestive and 4.89% for respiratory diseases.
- A reduced risk of inflammatory bowel disease (IBD) was observed (RR 0.58).
Conclusions:
- Childhood appendectomy is associated with altered long-term disease risks.
- Findings suggest the appendix plays a role in digestive and immune function.
- The appendix is not functionally redundant, especially during childhood immune development.
Background And Objectives:
Appendectomy is a common pediatric procedure generally considered safe beyond perioperative risks. However, the appendix may support gut biofilm maintenance and immune function, raising questions about potential long-term health consequences of its removal during childhood.
Methodology:
We examined associations between appendectomy before age 12 and subsequent risk of 25 disease outcomes between ages 12 and 30, using a population-based cohort of up to 1 071 086 children born in Denmark between 1979 and 1999 and followed through linked national registers until 2009. Stratified Cox regression models compared surgically treated individuals with matched controls without significant pre-surgical health differences. Analyses adjusted for pregnancy complications, parental disease history, birth weight, Apgar score, sex, and socioeconomic factors.
Results:
Childhood appendectomy was associated with increased risk of several disease categories, particularly digestive [relative risk (RR) 1.45-1.64], respiratory (RR 1.20-1.73), and genitourinary disorders (RR 1.30-1.72). In contrast, inflammatory bowel disease (IBD) risk was reduced (RR 0.58). Absolute risk increases were most notable for digestive (up to 2.81%) and respiratory diseases (up to 4.89%), suggesting measurable population-level associations.
Conclusions And Implications:
Childhood appendectomy is associated with altered long-term disease risk. These findings support evidence that the appendix contributes to digestive and immune function. Although the reduced risk of IBD may represent a beneficial association, our results suggest that the appendix is not functionally redundant, particularly during immune development in childhood.
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