Cohort studycited by the Tayebat archiveabstract only checked★ key study A-ORG-16 in-depth review
Long-term risks after spleen removal in US veterans
Long-term risks after splenectomy among 8,149 cancer-free American veterans: a cohort study with up to 27 years follow-up.
Overview
Kristinsson SY et al.. Haematologica 2014 · PMID 24056815 · DOI 10.3324/haematol.2013.092460
Serious infections were 2-3 times more frequent and blood clots about 2 times more frequent after spleen removal.
Does the study support the specific claim? Partly · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Splenectomy risks
- How was the study done?
Cohort
- How many people, animals or samples were studied?
8149
- What was actually found?
Higher infections, clots, cancers
- How large was the observed effect?
RR 1.9-3.4 infections
- What do the results mean in everyday life?
Vaccination and prophylaxis are important
- What are the study's limitations?
Confounding by indication
- What does it say about Elawady's specific claim?
Supports infection risk; cancer less certain
- Do the results apply to Germany and Europe?
Applicable
- What can explicitly not be concluded from this study?
Causation for cancer
Scientific in-depth review
1. Full reference
- Authors
- Kristinsson SY, Gridley G, Hoover RN, Check D, Landgren O
- Journal
- Haematologica
- Year
- 2014
- Identifier
- PMID 24056815 DOI 10.3324/haematol.2013.092460 · PMC3912973
- 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: Intramural NIH HHS
2. Research question
Long-term risks after splenectomy
3. Study design and population
- Study design
- Cohort study – Cohort of hospitalized US veterans; time-dependent Poisson regression
- Population
Cancer-free US veterans with splenectomy among >4 million hospitalized veterans
- Country
USA
- Period
Up to 27 years
- Sample size
8149 splenectomized
4. Methods and endpoints
- Exposure / intervention
Splenectomy
- Comparator
Other hospitalized veterans
- Endpoints
Infections, thromboembolism, cancer, death
5. Actual results
- Results
Pneumonia, meningitis, septicemia RR 1.9-3.4; DVT/PE RR 2.2; certain solid tumours RR 1.3-1.9; haematologic malignancies RR 1.8-6.0; deaths from pneumonia/septicemia RR 1.6-3.0; PE and CAD death RR 1.4-4.5; many risks increased >10 years after splenectomy.
- Absolute risks
not reported
- Authors' conclusion
Results underscore importance of vaccination, surveillance and thromboprophylaxis after splenectomy.
6. Strengths
- Large, long follow-up
7. Weaknesses
- Indications for splenectomy (trauma, haematologic disease) may confound
- Male veterans only
- Hospital-based comparator
8. Risk of bias
- Orienting tool
- ROBINS-E
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- some concerns
- Rationale
Confounding by indication: underlying diseases that lead to splenectomy can raise infection, thrombosis and cancer risk.
9. Assessment of the statistical interpretation
10. Relevance to the specific claim
Supports C-ORG-12 and C-ORG-13.
11. Independent contrary findings
A-ORG-17 (disease-matched comparison).
12. Transferability to Germany and Europe
Applicable with caution.
13. Overall methodological judgement
Infection risk robust; cancer/CV associations confounded.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | some concerns |
| Precision of results | moderate |
| Directness | direct |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | mixed |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | essentially correct but incomplete |
14. Open questions
15. Linked fact checks
- After splenectomy there is a lasting increased risk of serious infections (pneumonia, meningitis, sepsis); the spleen has no full functional substitute. – Studies supporting the claim
- Splenectomy raises the risk of venous thrombosis, cardiovascular events and cancer well beyond the first decade after surgery. – 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
Splenectomy raised pneumonia, sepsis, VTE and cancer risks persisting beyond 10 years.
- A. What was actually studied?
Long-term outcomes after splenectomy
- B. What did the authors find?
Elevated rate ratios for infections, VTE, cancers
- C. What conclusions do the authors themselves draw?
Vaccination, surveillance, thromboprophylaxis
- D. What does the archive derive from it?
Used to show the spleen has no full substitute.
- E. Is this derivation scientifically justified?
Numbers correct. The archive's own other citation (Rørholt 2017) shows that some cardiovascular risks are explained by underlying disease; the archive does not mention this limitation. Authors' conclusion (vaccination, prophylaxis) is about management, not avoiding indicated splenectomy.
- Adequacy of the interpretation (by the archive)
- essentially correct but incomplete