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Helen Y. N. Lindner, PhD; Ann Langius-Eklöf, PhD; Liselotte M. N. Hermansson, PhD

Test-retest reliability and rater agreements of Assessment of Capacity for Myoelectric Control version 2.0. Helen Y. N. Lindner, PhD; Ann Langius-Eklöf, PhD; Liselotte M. N. Hermansson, PhD. Aim

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Helen Y. N. Lindner, PhD; Ann Langius-Eklöf, PhD; Liselotte M. N. Hermansson, PhD

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  1. Test-retest reliability and rater agreements of Assessment of Capacity for Myoelectric Control version 2.0 Helen Y. N. Lindner, PhD; Ann Langius-Eklöf, PhD; Liselotte M. N. Hermansson, PhD

  2. Aim • Evaluate test-retest reliability and rater agreements of Assessment of Capacity for Myoelectric Control (ACMC) version 2.0. • Relevance • ACMC is an observation-based assessment that evaluates ability to control myoelectric prosthetic hand in bimanual activities • Stability of ACMC measures has not been evaluated over time.

  3. Method • Upper-limb prosthesis users: • Performed standardized activity twice, 2 to 5 wk apart. • Activity performances were: • Video recorded. • Assessed by 2 ACMC raters. • Data were analyzed by: • Weighted kappa. • Intraclass correlation coefficient (ICC). • Bland-Altman.

  4. Results • Test-retest reliability • Weighted kappa: fair to excellent. • ICC: 0.94. • Bland-Altman: 1 user outside limits of agreement. • Minimal detectable change (MDC):0.55 logits (1 rater) and 0.69 logits (2 raters). • Interrater reliability • Weighted kappa agreements: fair to excellent. • ICC: 0.95 (test) and 0.92 (retest). • Intrarater agreement • Excellent.

  5. Conclusion • Evidence regarding stability of ACMC version 2.0 measures over time is satisfactory. • MDC value can be clinically useful. • Further research is needed to determine: • Minimal clinically important difference. • Responsiveness of ACMC.

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