Journal of Rehabilitation Research & Development (JRRD)

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Volume 50 Number 7, 2013
   Pages 919 — 930

Abstract — Construct validity of Comprehensive High-Level Activity Mobility Predictor (CHAMP) for male servicemembers with traumatic lower-limb loss

Robert S. Gailey, PhD, PT;1–2* COL (Ret) Charles Scoville, PT, DPT;3 Ignacio A. Gaunaurd, PhD, MSPT;1–2 Michele A. Raya, PhD, PT, SCS, ATC;2 Alison A. Linberg, DPT, ATC;3 COL (Ret) Paul D. Stoneman, PhD, PT, MPT, DPT, OCS, SCS;3 MAJ (Ret) Stuart M. Campbell, MPT;4 Kathryn E. Roach, PhD, PT2

1Functional Outcomes Research and Evaluation Center, Miami Department of Veterans Affairs Healthcare System, Miami, FL; 2Department of Physical Therapy, Miller School of Medicine, University of Miami, Coral Gables, FL; 3Military Advanced Training Center, Walter Reed Army Medical Center, Washington, DC; 4Center for the Intrepid, Brooke Army Medical Center, San Antonio, TX

Abstract — This study examined the convergent construct validity of a new performance-based assessment instrument called the Comprehensive High-Level Activity Mobility Predictor (CHAMP) as a measure of high-level mobility in servicemembers (SMs) with traumatic lower-limb loss (LLL). The study was completed by 118 SMs. Convergent construct validity of the CHAMP was established using the 6-minute walk test (6MWT) as a measure of overall mobility and physical function and the Amputee Mobility Predictor (AMP) as a measure of basic prosthetic mobility. The known group methods construct validity examined disparities in high-level mobility capability among SMs with different levels of LLL. The CHAMP score demonstrated a strong positive relationship between 6MWT distance (r = 0.80, p < 0.001) and AMP score (r = 0.87, p < 0.001), respectively. In addition, the CHAMP can discriminate between different levels of LLL. Study findings support the CHAMP as a valid performance-based assessment instrument of high-level mobility for SMs with traumatic LLL.

Key words: 6-minute walk test, agility, Amputee Mobility Predictor, CHAMP, construct validity, high-level mobility, lower-limb loss, military personnel, OIF/OEF, traumatic amputation.

View HTML  ¦  View PDF  ¦  Contents Vol. 50, No. 7
This article and any supplementary material should be cited as follows:
Gailey RS, Scoville C, Gaunaurd IA, Raya MA, Linberg AA, Stoneman PD, Campbell SM, Roach KE. Construct validity of Comprehensive High-Level Activity Mobility Predictor (CHAMP) for male servicemembers with traumatic lower-limb loss. J Rehabil Res Dev. 2013;50(7): 919–30.
ResearcherID/ORCID: Robert S. Gailey, PhD, PT: I-3458-2013; Ignacio A. Gaunaurd, PhD, MSPT: I-3490-2013

Last Reviewed or Updated  Thursday, October 31, 2013 2:54 PM

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