Accelerometry and its association with objective markers of walking limitations in ambulatory adults with multiple sclerosis

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

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1942-1947
Number of pages6
JournalArchives of Physical Medicine and Rehabilitation
Volume91
Issue number12
DOIs
StatePublished - Dec 2010

Keywords

  • Gait
  • Mobility limitation
  • Multiple sclerosis
  • Rehabilitation
  • Walking

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation

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