Article

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.

Langue : ANGLAIS