Assessment of Arm Activity Using Triaxial Accelerometry in Patients With a Stroke

Sanne C. van der Pas, Jeanine A. Verbunt*, Dorien E. Breukelaar, Rachma van Woerden, Henk A. Seelen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


van der Pas SC, Verbunt JA, Breukelaar DE, van Woerden R, Seelen HA. Assessment of arm activity using triaxial accelerometry in patients with a stroke. Arch Phys Med Rehabil 2011;92:1437-42. Objective: To study the validity of accelerometry in the assessment of arm activity of patients with impaired arm function after stroke. Design: Cross-sectional concurrent validity study. Setting: Rehabilitation center. Participants: Patients (N=45) at different stages after stroke. Interventions: Not applicable. Main Outcome Measures: All patients wore 2 triaxial accelerometers around their wrists during 3 consecutive days. Arm activity was assessed, based on unilateral (activity of the affected arm) and bilateral accelerometry (ratio between the activity of the affected and nonaffected arm). The Motor Activity Log-26 (MAL-26) Amount of Use (AOU) scale was used as the main external criterion to test the concurrent validity of arm accelerometry. In addition, the MAL-26 Quality of Movement (QOM) scale and the Stroke Impact Scale (SIS) subscale Hand Function were used. To test the divergent validity, the SIS subscale Mobility was used. Spearman correlation coefficients were calculated. In an additional regression analysis, the hypothesized confounding influence of spasm, therapy intensity, and interobserver differences was studied. Results: Both unilateral (rho=.58, P
Original languageEnglish
Pages (from-to)1437-1442
JournalArchives of Physical Medicine and Rehabilitation
Issue number9
Publication statusPublished - Sept 2011


  • Activities of Daily Living
  • Arm
  • Rehabilitation
  • Stroke


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