AIM To describe fatigue in Duchenne muscular dystrophy (DMD) from patients' and parents' perspectives and to explore risk factors for fatigue in children and adolescents with DMD.METHOD A multicentre, cross-sectional study design was used. Seventy-one patients (all males; median age 12y, age range 5-17y) identified via the Canadian Neuromuscular Disease Registry, and their parents completed questionnaires. Subjective fatigue was assessed using the Pediatric Quality of Life Inventory Multidimensional Fatigue Scale by child self-report and parent proxy-report.
RESULTSPatients with DMD across ages and disease stages experienced greater fatigue compared to typically developing controls from published data. Sleep disturbance symptoms were associated with greater fatigue by child self-report (q=-0.42; p=0.003) and parent proxyreport (q=-0.51; p<0.001). Depressive symptoms were associated with greater fatigue by child self-report (q=-0.46; p<0.001) and parent proxy-report (q=-0.45; p<0.001). Lower functional ability was associated with greater fatigue by parent proxy-report (q=0.26; p=0.03). Physical activity level, and musculoskeletal, respiratory, and cardiac function were not associated with fatigue.