Cohort studycited by the Tayebat archiveabstract only checked★ key study A-ORG-02 in-depth review
Sweden: autoimmune diseases after tonsil removal
Tonsillectomy associated with an increased risk of autoimmune diseases: A national cohort study.
Overview
Ji J et al.. J Autoimmun 2016 · PMID 27344241 · DOI 10.1016/j.jaut.2016.06.007
People who had tonsils removed were diagnosed with autoimmune diseases 34% more often than the general population.
Does the study support the specific claim? Partly · Methodological quality: low
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Autoimmunity
- How was the study done?
Cohort vs population
- How many people, animals or samples were studied?
179,875
- What was actually found?
Higher incidence
- How large was the observed effect?
SIR 1.34
- What do the results mean in everyday life?
Possible link; cause unclear
- What are the study's limitations?
No matched controls
- What does it say about Elawady's specific claim?
Association only
- Do the results apply to Germany and Europe?
European
- What can explicitly not be concluded from this study?
Causation
Scientific in-depth review
1. Full reference
- Authors
- Ji J, Sundquist J, Sundquist K
- Journal
- J Autoimmun
- Year
- 2016
- Identifier
- PMID 27344241 DOI 10.1016/j.jaut.2016.06.007
- Verification
- verified – PubMed E-utilities efetch, 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
COI: not stated in record | Grants: none listed
2. Research question
Autoimmune disease after tonsillectomy
3. Study design and population
- Study design
- Cohort study – National cohort with standardized incidence ratios vs general population
- Population
All tonsillectomized persons in Sweden
- Country
Sweden
- Period
1997-2012
- Sample size
179,875
4. Methods and endpoints
- Exposure / intervention
Tonsillectomy
- Comparator
General population (SIR)
- Endpoints
Autoimmune diseases
- Statistical methods
SIR
5. Actual results
- Results
5357 later autoimmune diagnoses; overall SIR 1.34 (1.30-1.37); 16 specific diseases SIR 1.21-2.97; consistent by gender, age, indication.
- Absolute risks
not reported
- Authors' conclusion
Incidence of autoimmune diseases higher after tonsillectomy; immune dysfunction may partly explain; mechanisms need study.
6. Strengths
- National coverage
7. Weaknesses
- Comparison with general population, not with matched non-operated persons with similar infections
- No adjustment for confounders beyond standardization
- Surveillance/detection bias possible
8. Risk of bias
- Orienting tool
- ROBINS-E
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- high
- Rationale
SIR design cannot separate effect of surgery from underlying predisposition (recurrent infection/inflammation).
9. Assessment of the statistical interpretation
10. Relevance to the specific claim
Supports association in C-ORG-04.
11. Independent contrary findings
12. Transferability to Germany and Europe
European.
13. Overall methodological judgement
Weak causal evidence.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | low |
| Risk of bias | high |
| Precision of results | high |
| Directness | direct |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | unknown |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | partly correct but over-interpreted |
14. Open questions
15. Linked fact checks
- Tonsillectomy increases autoimmune disease by 34% (Ji 2016, 179,875 Swedish patients). – Studies supporting the claim
- Long-term registry data link removal of tonsils, appendix, gallbladder, uterus, ovaries and spleen to higher rates of respiratory disease, autoimmunity, cardiovascular events, gastrointestinal cancers and dementia; each organ does work the body never fully replaces. – Studies supporting the claim
Use by the Tayebat archive
Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.
- What the archive says about the study
Swedish cohort of 179,875 tonsillectomy patients showed a 34% increase in autoimmune disease; AR: supports an immune role of the tonsils.
- A. What was actually studied?
Autoimmune incidence after tonsillectomy vs population
- B. What did the authors find?
SIR 1.34
- C. What conclusions do the authors themselves draw?
Higher incidence; immune dysfunction may partly explain
- D. What does the archive derive from it?
Used as evidence of harm from removing tonsils.
- E. Is this derivation scientifically justified?
Number correct; causal reading ('34% increase ... after tonsillectomy') goes beyond the SIR design.
- Adequacy of the interpretation (by the archive)
- partly correct but over-interpreted