Article

The Assessment of Capacity for Myoelectric Control (ACMC) is an observation-based
tool that evaluates ability to control a myoelectric prosthetic hand. Validity
evidence led to ACMC version 2.0, but the test-retest reliability and minimal
detectable change (MDC) of the ACMC have never been evaluated. Investigation of
rater agreements in this version was also needed because it has new definitions
in certain rating categories and items. Upper-limb prosthesis users (n = 25, 15
congenital, 10 acquired; mean age 27.5 yr) performed one standardized activity
twice, 2 to 5 wk apart. Activity performances were videorecorded and assessed by
two ACMC raters. Data were analyzed by weighted kappa, intraclass correlation
coefficient (ICC), and Bland-Altman method. For test-retest reliability, weighted
kappa agreements were fair to excellent (0.52 to 1.00), ICC2,1 was 0.94, and one
user was located outside the limits of agreement in the Bland-Altman plot. MDC95
was less than or equal to 0.55 logits (1 rater) and 0.69 logits (2 raters). For
interrater reliability, weighted kappa agreements were fair to excellent in both
sessions (0.44 to 1.00), and ICC2,1 was 0.95 (test) and 0.92 (retest). Intrarater
agreement (rater 1) was also excellent (ICC3,1 0.98). Evidence regarding the
reliability of the ACMC is satisfactory and MDC95 can be used to indicate change.
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Langue : ANGLAIS