Meta-analysisindependent cross-checkabstract checked★ key study I-ORG-105 in-depth review
How often silent gallstones start causing problems
Asymptomatic gallstones: Cumulative incidence proportion, incidence rate, and risk factors for symptoms development: Systematic review and meta-analysis.
Overview
Alzoubi M et al.. PLoS One 2026 · PMID 41886405 · DOI 10.1371/journal.pone.0345462
About 10% of people with silent gallstones develop symptoms within 5 years and about 19% within 10 years.
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?
Estimate how often incidental gallstones become symptomatic
- How was the study done?
Meta-analysis of 8 cohort studies
- How many people, animals or samples were studied?
25,924 adults
- What was actually found?
Symptoms in 10% at 5 y, 19% at 10 y, 26% at 15 y
- How large was the observed effect?
About 2% per year
- What do the results mean in everyday life?
Most silent stones can be left alone, but they can cause symptoms later
- What are the study's limitations?
Observational, heterogeneous studies
- What does it say about Elawady's specific claim?
Partly supports (silent stones usually harmless), partly refutes (they can cause symptoms)
- Do the results apply to Germany and Europe?
Directly applicable
- What can explicitly not be concluded from this study?
Does not test diet
Scientific in-depth review
1. Full reference
- Authors
- Alzoubi M et al.
- Journal
- PLoS One
- Year
- 2026
- Identifier
- PMID 41886405 DOI 10.1371/journal.pone.0345462
- 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
Not stated in abstract.
2. Research question
Cumulative incidence, incidence rate and risk factors of progression of incidentally found asymptomatic gallstones to symptomatic disease and complications.
3. Study design and population
- Study design
- Meta-analysis – Systematic review and meta-analysis of cohort studies (PROSPERO CRD42024526889)
- Population
Adults with incidentally diagnosed gallstones
- Country
Multinational (8 cohorts)
- Period
Search to July 2025
- Sample size
8 cohort studies (9 reports), 25,924 participants
- Inclusion and exclusion criteria
Incidental gallstones; excluded known gallstone disease, bariatric surgery, cholecystectomy, pregnancy, oestrogen therapy, children
4. Methods and endpoints
- Exposure / intervention
Asymptomatic gallstones (natural history)
- Comparator
Single-arm proportions; risk factors compared with RR
- Endpoints
Progression to symptomatic gallstone disease and complications
- Statistical methods
Random-effects proportions; RR; I2
5. Actual results
- Results
Cumulative incidence of symptomatic progression 0.10 (95% CI 0.10-0.11) at 5 years, 0.19 (0.14-0.25) at 10 years, 0.26 (0.12-0.40) at 15 years. Risk factors: alcohol RR 1.32 (1.27-1.38), hyperlipidaemia RR 1.19 (1.07-1.32); chronic liver disease RR 0.76 (0.67-0.87) and male sex RR 0.54 (0.33-0.87) protective.
- Absolute risks
About 10% symptomatic at 5 years, 19% at 10 years, 26% at 15 years (about 2% per year).
- Authors' conclusion
The review identifies factors for symptomatic progression of asymptomatic gallstones and may help identify high-risk patients who could benefit from prophylactic cholecystectomy.
6. Strengths
- Registered protocol
- Large pooled sample
- Direct natural-history question
7. Weaknesses
- Only 8 observational cohorts
- Heterogeneous definitions
- Wide CI at 15 years
8. Risk of bias
- Orienting tool
- AMSTAR 2
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- some concerns
- Rationale
Registered and multi-database search; observational primary studies with heterogeneous follow-up.
9. Assessment of the statistical interpretation
Cumulative proportions translate to a roughly constant 2% annual risk (stats/C-ORG-07_gallstones.py).
10. Relevance to the specific claim
Quantifies how often 'silent' gallstones become symptomatic.
11. Independent contrary findings
None of note; consistent with Morris-Stiff 2023 (2% per year).
12. Transferability to Germany and Europe
High.
13. Overall methodological judgement
Confirms that most incidental gallstones stay silent (supports part of the claim) but a substantial minority becomes symptomatic over 10-15 years (refutes 'no symptoms and no harm').
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | some concerns |
| Precision of results | moderate |
| Directness | direct |
| Reproducibility | replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Complication-specific rates (pancreatitis, cholecystitis).
15. Linked fact checks
- Gallstones cause no symptoms and no harm, have nothing to do with pain after eating, and the gallbladder should not be removed. – Studies with mixed or unclear results