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Accelerometry and Its Association With Objective Markers of Walking Limitations in Ambulatory Adults With Multiple Sclerosis

2010; Elsevier BV; Volume: 91; Issue: 12 Linguagem: Inglês

10.1016/j.apmr.2010.08.011

1532-821X

Robert W. Motl, Deirdre Dlugonski, Yoojin Suh, Madeline Weikert, Bo Fernhall, Myla Goldman,

Rheumatoid Arthritis Research and Therapies

Motl RW, Dlugonski D, Suh Y, Weikert M, Fernhall B, Goldman M. Accelerometry and its association with objective markers of walking limitations in ambulatory adults with multiple sclerosis. Objective To validate accelerometry based on its correlations with 6-minute walk distance (6MWD) and oxygen cost of walking as objective markers of walking limitations in multiple sclerosis (MS). Design Cross-sectional. Setting Laboratory and general community. Participants Ambulatory participants with MS (N=26) who resided in the local community. Interventions Not applicable. Main Outcome Measures Patient Determined Disease Steps (PDDS) scale and Multiple Sclerosis Walking Scale-12 (MSWS-12); 6-minute walk test while wearing a portable metabolic unit for measuring the 6MWD and oxygen cost of walking; accelerometer during the waking hours of a 7-day period. Results The average of total daily movement counts from the accelerometer correlated significantly and strongly with MSWS-12 scores (ρ=–.681, P=.001), PDDS scores (ρ=–.609, P=.001), 6MWD (ρ=.519, P=.003), and oxygen cost of walking (ρ=–.541, P=.002). Conclusions We provide evidence that further supports the validity of accelerometry as a measure of walking limitations in ambulatory persons with MS.