E0 ConsensusPreliminaryPEM unclearSystematic-ReviewPeer-reviewedMachine draft
Functional somatic syndromes and joint hypermobility: A systematic review and meta-analysis.
Chen, Grant, Olver, James S, Kanaan, Richard A · Journal of psychosomatic research · 2021 · DOI
Quick Summary
This review looked at whether people with ME/CFS and similar conditions have more flexible or hypermobile joints than other people. Researchers examined 11 studies comparing joint flexibility in people with ME/CFS, fibromyalgia, and similar conditions to healthy controls. They found that people with these conditions were about three times more likely to have joint hypermobility, though the quality of the studies varied.
Why It Matters
Joint hypermobility is a treatable condition that may contribute to symptoms in ME/CFS and related functional somatic syndromes. Understanding the relationship between these two conditions could lead to better diagnostic approaches and targeted physical management strategies for some ME/CFS patients.
Observed Findings
- Nine of eleven reviewed studies found increased rates of joint hypermobility in functional somatic syndromes compared to controls.
- Meta-analysis showed an odds ratio of 3.27 (95% CI: 1.83–5.84; p < 0.001) for joint hypermobility in FSS.
- Included studies focused primarily on three conditions: fibromyalgia (5 studies), chronic fatigue syndrome/ME/CFS (3 studies), and functional gastrointestinal disorder (3 studies).
- Most included studies were rated as fair to poor quality.
Inferred Conclusions
- There is evidence for an association between functional somatic syndromes and joint hypermobility, with individuals with JH having significantly greater odds of FSS.
- The strength of this association is limited by the generally poor methodological quality of available studies.
- The narrow range of FSS studied (primarily fibromyalgia and ME/CFS) suggests findings may not generalize to all FSS conditions.
Remaining Questions
- Does joint hypermobility play a causal role in ME/CFS symptom development, or is it simply a co-occurring feature?
- How does the prevalence of joint hypermobility in ME/CFS compare across different geographic and demographic populations?
- Would targeted management of joint hypermobility improve outcomes or reduce symptom severity in ME/CFS patients?
What This Study Does Not Prove
This study does not prove that joint hypermobility *causes* ME/CFS or that treating hypermobility will resolve ME/CFS symptoms. The association is correlational, not causal, and the poor quality of most included studies means findings require confirmation with higher-quality research before being generalized to all ME/CFS populations.
Tags
Symptom:PainFatigue
Method Flag:Weak Case DefinitionMixed Cohort
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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