The Association Between Neuropathic Pain, Pain Intensity, and Inflammatory Activity in Rheumatoid Arthritis

Area of Science:

• Rheumatology
• Pain Medicine
• Clinical Psychology

Background:

• Nociplastic pain, characterized by altered pain processing, significantly impacts rheumatoid arthritis (RA) patients.
• Understanding the clinical correlates and disease activity associations of nociplastic-like pain in RA is crucial but remains incomplete.

Purpose of the Study:

• To determine the prevalence of nociplastic-like pain features in RA patients.
• To investigate the associations between these pain features and disease activity, pain intensity, fatigue, sleep quality, and health-related quality of life.

Main Methods:

• A cross-sectional study involving 160 RA patients.
• Nociplastic-like pain assessed via PainDETECT questionnaire.
• Disease activity (DAS28), pain (VAS), fatigue (FACIT-F), sleep (PSQI), and quality of life (SF-36) were evaluated.

Main Results:

• 22.5% of RA patients exhibited nociplastic-like pain features.
• These patients reported higher pain intensity, fatigue, poorer sleep, and lower quality of life.
• PainDETECT scores correlated strongly with pain intensity and moderately with DAS28, but regression analysis identified pain intensity, tender joint count, and education as independent predictors, excluding inflammatory markers.

Conclusions:

• Nociplastic-like pain is prevalent in RA and associated with pain intensity, joint tenderness, and psychosocial factors, independent of inflammatory markers.
• Routine assessment of nociplastic-like pain is vital for personalized RA pain management.
• Central sensitization mechanisms should be considered alongside anti-inflammatory treatments in RA care.