Related Experiment Video
Updated: Mar 23, 2026
04:50
Preliminary Study on Acupuncture Combined with Grain-sized Moxibustion for Treating Rheumatoid Arthritis with Finger Joint Pain
Published on: May 16, 2025
1.3K
Central pain sensitivity is associated with changes in fatigue in RA: data from the CAP-RA study
Vasileios Georgopoulos1,2,3, Stephanie L Smith1,2,3, David A Walsh1,2,3,4
1Academic Unit of Injury, Recovery and Inflammation Sciences, School of Medicine, University of Nottingham, Nottingham, UK.
Rheumatology (Oxford, England)
|March 21, 2026
Summary
Central pain sensitivity, not inflammation or pain severity, significantly drives fatigue in rheumatoid arthritis (RA). Targeting central pain mechanisms may reduce RA-related fatigue.
Area of Science:
- Rheumatology
- Pain Science
- Clinical Research
Background:
- Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by joint inflammation, pain, and significant fatigue.
- Fatigue is a debilitating symptom in RA, impacting quality of life, yet its underlying mechanisms remain incompletely understood.
- Central pain sensitivity, an amplification of pain signaling in the central nervous system, is increasingly recognized as a factor in chronic pain conditions.
Purpose of the Study:
- To investigate the association between central pain sensitivity and fatigue in patients with rheumatoid arthritis (RA).
- To determine if pain severity or inflammation explains the relationship between central pain sensitivity and fatigue.
- To explore the longitudinal impact of central pain sensitivity on fatigue levels in RA.
Main Methods:
- An observational study involving 194 participants with RA assessed at baseline and 114 at 3-month follow-up.
- Self-reported fatigue (BRAF-MDQ) and pain sensitivity (modified Central Aspects of Pain - M-CAP) were measured, alongside pain severity.
- Quantitative sensory testing (QST) and inflammatory markers (DAS28, CRP, ultrasound) were used to assess pain sensitivity and inflammation.
Main Results:
- Self-reported central pain sensitivity (M-CAP) and pain severity were strongly associated with higher fatigue at both baseline and 3-month follow-up.
- M-CAP remained a significant predictor of fatigue even when pain severity was accounted for in regression models (β=0.65, p<0.001).
- A decrease in M-CAP over time was significantly associated with a reduction in fatigue; QST and inflammatory markers showed no consistent association with fatigue.
Conclusions:
- Self-reported central pain sensitivity (M-CAP) is a primary driver of fatigue in RA, independent of pain intensity and inflammation.
- These findings suggest that treatments aimed at modulating central pain mechanisms could be a promising strategy for managing fatigue in RA patients.
