ArticleMovement disorders clinical practice2024
Appendectomy and the Risk of Parkinson's Disease: A Korean Nationwide Study.
Article in Movement disorders clinical practice, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
3 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Appendectomy and risk of Parkinson's disease: a systematic review and meta-analysis.Frontiers in neurology · 2025Pooled it
- Brain-Only Versus GI-Only Synucleinopathy: A Comprehensive Autopsy Study With Both IHC and SAA.medRxiv : the preprint server for health sciences · 2026Article
- The functional landscape of the appendix microbiome under conditions of health and disease.Gut pathogens · 2025Review
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
backgroundThe vermiform appendix is considered a potential reservoir for the abnormal α-synuclein aggregate in Parkinson's disease (PD). Previous epidemiologic evidence on the association between appendectomy and PD risk remains inconclusive, especially outside the Western world.
objectivesTo investigate the association between appendectomy and PD risk in Korea.
methodsAmong 703,831 eligible adult subjects in the National Health Insurance Service sample cohort, we identified 16,122 patients who underwent appendectomy. The rest formed the control group. PD risk was assessed using time-dependent Cox regression analyses.
resultsThe appendectomy group did not have altered risk of PD compared with the control group in either unadjusted [hazard ratio (HR) 1.32, 95% confidence interval (CI) 0.97-1.80, P = 0.08] or adjusted model (HR 1.42, CI 0.88-2.30, P = 0.15). No further statistical difference appeared when stratified by sex.
conclusionsAppendectomy is not associated with altered risk of PD in the Korean population.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.