Cronbach's alpha was determined for each PROMIS measure to assess internal consistency. Accelerometers were worn for seven days, and mean daily minutes of light, moderate/vigorous, and bouted (10 minutes) moderate/vigorous physical activity were estimated. Secondary outcomes were PROMIS standardized T-scores in seven health status domains. The primary fatigue outcome was Fatigue Severity Scale score. This cross-sectional study analyzed 123 adults with SLE. The internal consistency of each PROMIS measure in our SLE sample was also evaluated. We aimed to characterize relationships between fatigue, other health status measures assessed with the Patient Reported Outcomes Measurement Information System (PROMIS) instruments, and accelerometer-based physical activity measurements in patients with SLE. 9 Division of Rheumatology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.įatigue is a common symptom in systemic lupus erythematosus (SLE), and engaging in physical activity may reduce fatigue.8 Division of Rheumatology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA Center for Healthcare Studies, Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.7 Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
1 Division of Rheumatology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA 2 Division of Rheumatology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA Arthritis and Rheumatism Associates, Wheaton, MD, USA.
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