Article

This study describes the development and psychometric evaluation of a
novel patient-reported single-item mobility measure.
DESIGN: Prospective cohort
study. SETTING: Four Veteran's Administration Medical Centers. SUBJECTS: Individuals undergoing their first major unilateral lower extremity amputation;
198 met inclusion criteria; of these, 113 (57%) enrolled. INTERVENTIONS: None.
MAIN MEASURES: The Amputee Single Item Mobility Measure, a single item measure
with scores ranging from 0 to 6, was developed by an expert panel, and
concurrently administered with the Locomotor Capabilities Index-5 (LCI-5) and
other outcome measures at six weeks, four months, and 12 months post-amputation.
Criterion and construct validity, responsiveness, and floor/ceiling effects were
evaluated. Responsiveness was assessed using the standardized response mean.
RESULTS: The overall mean 12-month Amputee Single Item Mobility Measure score was
3.39 +/-1.4. Scores for transmetatarsal, transtibial, and transfemoral amputees
were 4.2 (+/-1.3), 3.2 (+/-1.5), and 2.9 (+/-1.1), respectively. Amputee Single
Item Mobility Measure scores demonstrated "large" and statistically significant
correlations with the LCI-5 scores at six weeks (r = 0.72), four months (r =
0.81), and 12 months (r = 0.86). At four months and 12 months, the correlation
between Amputee Single Item Mobility Measure scores and hours of prosthetic use
were r = 0.69 and r = 0.66, respectively, and between Amputee Single Item
Mobility Measure scores and Trinity Amputation and Prosthesis Experience Scales
functional restriction scores were r = 0.45 and r = 0.67, respectively. Amputee
Single Item Mobility Measure scores increased significantly from six weeks to 12
months post-amputation. Minimal floor/ceiling effects were demonstrated.
CONCLUSIONS: In the unilateral dysvascular amputee, the Amputee Single Item
Mobility Measure has strong criterion and construct validity, excellent
responsiveness, and does not exhibit floor/ceiling effects.
CI - (c) The Author(s) 2016.

Langue : ANGLAIS