E2 ModerateModerate confidencePEM ?Cross-SectionalPeer-reviewedMachine draft
Chronic Overlapping Pain Conditions in people with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS): a sample from the Multi-site Clinical Assessment of ME/CFS (MCAM) study.
Fall, Elizabeth A, Chen, Yang, Lin, Jin-Mann S et al. · BMC neurology · 2024 · DOI
Quick Summary
This study found that most people with ME/CFS (76%) also experience other chronic pain conditions, such as migraines, fibromyalgia, lower back pain, and irritable bowel syndrome. These overlapping conditions were much more common in ME/CFS patients compared to healthy people (only 17% had them). When patients had multiple pain conditions alongside their ME/CFS, their overall symptoms and quality of life were significantly worse, especially for women.
Why It Matters
Understanding how common overlapping pain conditions are in ME/CFS can help clinicians recognize and treat these comorbidities, potentially improving patient outcomes. The finding that these conditions significantly worsen symptoms suggests that targeted assessment and management of these pain conditions could meaningfully improve quality of life for ME/CFS patients. This research validates the lived experience of many patients who struggle with multiple overlapping conditions.
Observed Findings
- 76% of ME/CFS patients had at least one chronic overlapping pain condition compared to 17.4% of healthy controls.
- Chronic migraine/headache was most prevalent in ME/CFS (48.1%), followed by fibromyalgia (45.0%), chronic low back pain (33.1%), and irritable bowel syndrome (31.6%).
- Fibromyalgia showed the strongest association with ME/CFS (147.74 times more common), followed by chronic low back pain (39.45 times more common).
- Comorbid chronic low back pain and fibromyalgia had substantial impacts on pain severity measures with effect sizes of 0.8 or larger.
- All individual chronic overlapping pain conditions except temporomandibular disorder were significantly more frequent in females than males with ME/CFS.
Inferred Conclusions
- More than three-quarters of ME/CFS patients experience one or more chronic overlapping pain conditions, suggesting these are a core feature of the illness rather than coincidental.
- Multiple comorbid pain conditions substantially worsen illness severity, particularly pain intensity, and secondarily impact functioning and quality of life.
- Assessment and targeted management of chronic overlapping pain conditions may be an important clinical intervention to improve outcomes in ME/CFS, especially for female patients.
- Fibromyalgia and chronic low back pain appear to be the most impactful comorbidities requiring clinical attention in ME/CFS populations.
What This Study Does Not Prove
This study cannot establish whether these pain conditions cause ME/CFS, result from it, or share common underlying mechanisms—it only shows they frequently occur together. The cross-sectional design means we cannot determine the temporal sequence of when conditions developed. Results from specialty clinics may not reflect the broader ME/CFS population, so these prevalence rates may not apply to all patients with ME/CFS.
Tags
Symptom:PainFatigue
Method Flag:Strong PhenotypingSex-Stratified