The measurement of fatigue in patients with multiple sclerosis. A multidimensional comparison with patients with chronic fatigue syndrome and healthy subjects. — CFSMEATLAS
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The measurement of fatigue in patients with multiple sclerosis. A multidimensional comparison with patients with chronic fatigue syndrome and healthy subjects.
Vercoulen, J H, Hommes, O R, Swanink, C M et al. · Archives of neurology · 1996 · DOI
Quick Summary
This study compared fatigue in three groups: people with MS, people with ME/CFS, and healthy people. The researchers found that both MS and ME/CFS patients experienced severe fatigue that affected their daily life. Interestingly, psychological factors like how much someone focuses on their body sensations and whether they feel in control of their symptoms seemed to influence fatigue severity in both diseases.
Why It Matters
This study provides evidence that ME/CFS-related fatigue shares key characteristics with MS fatigue—particularly its impact on daily function and its relationship to psychological factors rather than objective disease measures. Understanding these shared mechanisms may help identify interventions targeting symptom perception and control, which could benefit ME/CFS patients regardless of disease etiology.
Observed Findings
46% of MS patients reported fatigue at least once weekly; both MS and ME/CFS patients had significantly higher subjective fatigue severity than healthy controls.
MS and ME/CFS patients showed similar fatigue profiles, except ME/CFS patients had significantly higher somatization scores (greater bodily symptom focus).
Both patient groups were significantly less physically active than healthy subjects.
Fatigue severity in both MS and ME/CFS correlated with functional impairment and low sense of symptom control, but not with depression or objective disability measures (EDSS).
In ME/CFS only, low physical activity and symptom attribution to physical causes correlated with fatigue severity.
Inferred Conclusions
Psychological factors—particularly sense of control and bodily symptom focus—play a significant role in fatigue experience in both MS and ME/CFS, independent of objective disease measures.
Fatigue's impact on daily functioning in both diseases is not explained by depression or physical disability severity alone.
MS and ME/CFS may share common fatigue mechanisms related to attention to bodily sensations and perceived loss of control, despite different underlying pathologies.
Remaining Questions
What are the causal mechanisms linking low sense of control and somatization to fatigue severity in ME/CFS?
What This Study Does Not Prove
This study does not prove that fatigue in MS and ME/CFS have identical underlying causes, only that they share similar phenomenological and psychological profiles. The cross-sectional design cannot establish whether psychological factors cause fatigue severity or whether fatigue leads to changes in psychological state. The study also does not determine whether somatization is adaptive or maladaptive in either condition.
Tags
Symptom:Fatigue
Method Flag:PEM Not DefinedWeak Case DefinitionSmall Sample
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 →
Why does the relationship between physical activity and fatigue differ between MS and ME/CFS?
Can interventions targeting sense of control and symptom perception reduce fatigue in ME/CFS, and if so, how do they compare to disease-modifying approaches?
How do cognitive and attention patterns in ME/CFS differ from MS, and do these explain the higher somatization scores in ME/CFS?