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Aim

This study explores the relationship between community-based walking and movement counts recorded by a waist-worn accelerometer in individuals with multiple sclerosis (MS). The research aims to validate the use of accelerometry in measuring community ambulation objectively in MS patients. Results indicate significant correlations between walking time and movement counts, supporting accelerometry as a useful tool in assessing community ambulation in MS.

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Aim

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  1. Does a waist-worn ActiGraph accelerometer quantify community ambulation in persons with multiple sclerosis? Jacob J. Sosnoff, PhD; Michael J. Socie, MS; Morgan K. Boes, MS; Brian M. Sandroff, MS; Robert W. Motl, PhD

  2. Aim • Examine association between community-based walking and movement counts recorded by waist-worn accelerometer in persons with multiple sclerosis (MS). • Relevance • Accelerometry objectively measures community ambulation in persons with MS. • However, assumption that walking itself serves as major contributor to accelerometer signal hasn’t been tested.

  3. Method • Ambulatory persons with MS wore triaxial accelerometer (ActiGraph GT3X) and IDEEA system for 1 day. • 5 males/17 females. • 13 without aid/9 with aid. • Outcome measures for accelerometer: • Movement counts per hour for vertical, anterior-posterior, and mediolateral axes. • Outcomes for IDEEA system: • % time walking, sitting, standing; walking speed.

  4. Results • Significant correlations between: • % walking time and movement counts per hour along the vertical and anterior-posterior axes. • Movement counts per hour along the vertical axis and: • walking speed • self-reported walking impairment • disability.

  5. Conclusion • Our observations further support accelerometry as objective marker of community ambulation in persons with MS.

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