Systematic reviewindependent cross-checkabstract checked★ key study I-ORG-101 in-depth review
Tonsil and adenoid surgery for children who snore or have sleep apnoea
Tonsillectomy or adenotonsillectomy versus non-surgical management for obstructive sleep-disordered breathing in children.
Overview
Venekamp RP et al.. Cochrane Database Syst Rev 2015 · PMID 26465274 · DOI 10.1002/14651858.CD011165.pub2
Surgery normalised sleep studies in 79% versus 46% with watchful waiting and improved symptoms, but did not improve attention or thinking tests.
Does the study support the specific claim? Partly · Methodological quality: high
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Compare tonsil/adenoid removal with no surgery in children with sleep-disordered breathing
- How was the study done?
Cochrane systematic review of randomised trials
- How many people, animals or samples were studied?
3 trials, 562 children
- What was actually found?
Better symptoms, quality of life and sleep studies after surgery; no gain in cognition; many untreated children improved
- How large was the observed effect?
PSG normalisation RD 33% (24-42%); OSA-18 MD -17.7
- What do the results mean in everyday life?
For children with sleep apnoea, surgery helps symptoms, but waiting and re-checking is a reasonable option in mild cases
- What are the study's limitations?
Few trials, short follow-up, no data under age 5
- What does it say about Elawady's specific claim?
Supports caution but not a rule that tonsils must never be removed
- Do the results apply to Germany and Europe?
Directly applicable
- What can explicitly not be concluded from this study?
Cannot say anything about diet as a treatment; not tested
Scientific in-depth review
1. Full reference
- Authors
- Venekamp RP et al.
- Journal
- Cochrane Database Syst Rev
- Year
- 2015
- Identifier
- PMID 26465274 DOI 10.1002/14651858.CD011165.pub2
- Verification
- verified – PubMed efetch 2026-10-26; Crossref works API 2026-10-26
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
Review funded in part by non-governmental support (PubMed: Research Support, Non-U.S. Gov't); details not in abstract.
2. Research question
Benefits and harms of (adeno)tonsillectomy versus non-surgical management in children with obstructive sleep-disordered breathing.
3. Study design and population
- Study design
- Systematic review – Cochrane systematic review of RCTs (3 trials, 562 children); results not pooled because of clinical heterogeneity
- Population
Children 2-16 years with obstructive sleep-disordered breathing (oSDB), incl. polysomnography-confirmed mild-moderate OSAS (CHAT trial, 453 children aged 5-9).
- Country
USA (CHAT), others
- Period
Search to 5 March 2015
- Sample size
3 RCTs, 562 children
- Inclusion and exclusion criteria
RCTs comparing (adeno)tonsillectomy with non-surgical management (watchful waiting or CPAP) in children with oSDB.
4. Methods and endpoints
- Exposure / intervention
Adenotonsillectomy
- Comparator
Watchful waiting (CHAT, Goldstein) or CPAP (Sudarsan)
- Endpoints
Disease-specific quality of life/symptoms; adverse events; PSG normalisation; neurocognition; behaviour
- Statistical methods
Mean differences and risk differences per trial; GRADE
5. Actual results
- Results
CHAT at 7 months: OSA-18 31.8 vs 49.5 (MD -17.7, 95% CI -21.2 to -14.2); PSQ-SRBD MD -0.3 (-0.31 to -0.26); modified Epworth MD -2.0 (-2.9 to -1.1). Serious adverse events 6/194 (3%) vs 9/203 (4%) (RD -1%, -5% to 2%). PSG normalisation 153/194 (79%) vs 93/203 (46%) (RD 33%, 24% to 42%). Neurocognitive performance, attention and executive function not improved by surgery. Down syndrome/MPS trial: AT vs CPAP no significant difference in OSA-18 at 12 months.
- Absolute risks
PSG normalisation 79% vs 46% at 7 months; serious adverse events 3% vs 4%.
- Authors' conclusion
Moderate-quality evidence that adenotonsillectomy improves quality of life, symptoms and caregiver-rated behaviour in otherwise healthy 5-9-year-olds with mild-moderate OSAS and high-quality evidence for PSG benefit, but no benefit in objective attention/neurocognition; almost half normalised with watchful waiting, so benefits and risks should be weighed against watchful waiting. No data for children under 5.
6. Strengths
- Cochrane methods with GRADE
- Dominated by one large low-risk-of-bias RCT (CHAT)
7. Weaknesses
- Only 3 trials; no pooling
- Short follow-up (7-12 months)
- No data for children under 5, the age group most often operated
8. Risk of bias
- Orienting tool
- AMSTAR 2
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- low
- Rationale
Cochrane review with protocol, comprehensive search and GRADE; low risk of bias at review level.
9. Assessment of the statistical interpretation
Relative and absolute effects both reported; the 33-point RD in PSG normalisation gives NNT about 3 (stats/C-ORG-01_tonsil_trials.py).
10. Relevance to the specific claim
Directly tests surgery versus non-surgical management for the commonest indication for adenotonsillectomy in children.
11. Independent contrary findings
PATS (I-ORG-102) and KATE (I-ORG-103) later trials in milder disease show smaller or no objective benefit.
12. Transferability to Germany and Europe
High: guideline-relevant RCT evidence used in European practice.
13. Overall methodological judgement
Strong evidence that surgery helps symptoms and sleep studies in childhood OSA, and equally strong evidence that many mild cases improve without surgery. Supports a conservative-first option for mild disease; contradicts a rule never to operate.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | high |
| Risk of bias | low |
| Precision of results | moderate |
| Directness | direct |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Effects in children under 5 and long-term outcomes.
15. Linked fact checks
- Adenoids, tonsils and the gallbladder are organs that should not be removed; correcting the diet should be the foundation of treatment. – Studies with mixed or unclear results
- No working organ should be removed (e.g., a thyroid with nodules that still functions); one should stay away from the scalpel, and Elawady is 'against any operation, including caesarean section'. – Studies contradicting or limiting the claim