Test-retest reliability and rater agreements of Assessment of Capacity forMyoelectric Control version .

摘要

The Assessment of Capacity for Myoelectric Control(ACMC) is an observationbased tool that evaluates abilityto control a myoelectric prosthetic hand. Validity evidence led toACMC version 2.0, but the testretest reliability and minimaldetectable change (MDC) of the ACMC have never been evaluated.Investigation of rater agreements in this version was alsoneeded because it has new definitions in certain rating categoriesand items. Upperlimb prosthesis users (n = 25, 15 congenital, 10acquired; mean age 27.5 yr) performed one standardized activitytwice, 2 to 5 wk apart. Activity performances were videorecordedand assessed by two ACMC raters. Data were analyzedby weighted kappa, intraclass correlation coefficient (ICC), andBlandAltman method. For testretest reliability, weighted kappaagreements were fair to excellent (0.52 to 1.00), ICC2,1 was0.94, and one user was located outside the limits of agreement inthe BlandAltman plot. MDC95 was less than or equal to 0.55logits (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 satisfactoryand MDC95 can be used to indicate change.