Article

OBJECTIVE: To assess construct validity of the Prosthetic Limb Users Survey of
Mobility (PLUS-M), a self-report mobility measure for people with lower limb
amputation (LLA). DESIGN: Cross-sectional study.
SETTING: Private prosthetic
clinics (n=37). PARTICIPANTS: Current lower limb prosthesis users (N=199; mean
age +/- SD, 55.4+/-14.3y; 71.4% men) were assessed before receiving a replacement
prosthesis, prosthetic socket, and/or prosthetic knee. INTERVENTIONS: Not
applicable. MAIN OUTCOME MEASURES: Convergent construct validity was examined
using correlations between participants' PLUS-M T-scores and measures of physical
function, mobility, and balance, including the Amputee Mobility Predictor (AMP),
timed Up and Go (TUG), Patient-Reported Outcomes Measurement Information
System-Physical Function (PROMIS-PF), Prosthesis Evaluation
Questionnaire-Mobility Subscale (PEQ-MS), and Activities-specific Balance
Confidence (ABC) Scale. Known-groups construct validity was evaluated by
comparing differences in PLUS-M T-scores among participants grouped by Medicare
Functional Classification Level (MFCL). RESULTS: PLUS-M T-scores demonstrated a
moderate positive relationship with AMP scores (rho=.54, P<.001) and a moderate
negative relationship with TUG times (rho=-.56, P<.001). The PLUS-M also showed a
strong positive relationship with PEQ-MS scores (rho=.78, P<.001), ABC Scale
scores (rho=.81, P<.001), and PROMIS-PF T-scores (rho=.81, P<.001). Significant
differences (P<.05) in PLUS-M T-scores were found among groups of people
classified by different MFCLs. CONCLUSIONS: Study results support the validity of
the PLUS-M as a self-report measure of prosthetic mobility. Correlations between
PLUS-M and measures of physical function, mobility, and balance indicate
convergent construct validity. Similarly, significant differences in PLUS-M
T-scores across MFCL groups provide evidence of known-groups construct validity.
In summary, evidence indicates that PLUS-M has good construct validity among
people with LLA.
CI - Copyright (c) 2016 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS