Modeling functional decline over time in sporadic inclusion body myositis.
2017
Introduction: The ability to individualize recommendations or expectations of disease progression based on a patient's unique characteristics has merit for use in sporadic inclusion body myositis (sIBM).
Methods: Fifty-five subjects with sIBM completed a battery of strength and functional outcomes at 2 study visits. These were used to develop mathematical models of disease progression in patients with sIBM for use in clinical and research settings.
Results: The six minute walk test (6MWT) distance declined an average of 27.5 meters (12%) per year. Significant factors that predict 6MWT were knee extension and plantarflexion strength and body weight, whereas the ability to stand from a chair was impacted by elbow extension strength. Stepping up on a curb was influenced by the patient's age at diagnosis and by knee extension. Statistical models to predict functional decline in sIBM were developed.
Discussion: Statistical models help explain the complex factors that influence decreased walking ability and other functional activities in sIBM. This article is protected by copyright. All rights reserved.
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