Objectives. RA-related fatigue is common and debilitating, but does not always respond to immunotherapy. In the context of anti-TNF therapy, we aimed to examine whether patients achieving disease remission experienced remission of fatigue.
Methods. Data from the British Society for Rheumatology Biologics Register for RA were used. In participants with severe baseline fatigue [36-item Short Form Health Survey (SF-36) vitality score ≤12.5], we identified those in disease remission [28-joint DAS (DAS28) <2.6] by 6 months. Fatigue response was evaluated according to partial (SF-36 vitality score >12.5) and complete remission (SF-36 vitality score >50) at follow-up. Demographic (e.g. sex, age), clinical (e.g. inflammation, joint erosion and co-morbidities) and psychosocial (e.g. SF-36 domains and HAQ) characteristics were compared between responder and non-responder groups.
Results. Severe baseline fatigue was reported by 2652 participants, of whom 271 (10%) achieved a DAS28 <2.6 by 6 months. In total, 225 participants (83%) reported partial remission and were distinguished from those who did not by better health status on all psychosocial domains. Far fewer [n = 101 (37.3%)] reported full fatigue remission. In addition to reporting clinically poorer health status, they were distinguished on the basis of a history of hypertension, depression and stroke as well as baseline treatment use of steroids and antidepressants.
Conclusion. Despite achieving clinical remission, many RA patients do not achieve complete remission of their fatigue. Therefore, despite being important in overall disease control, reductions in disease activity are not always sufficient to ameliorate fatigue, so other symptom-specific management approaches must be considered for those for whom fatigue does not resolve.