Article

Use of outcome measures to examine outcomes of amputation is
complicated by a number of factors, including ease of administration and lack of
scientific evidence to guide selection and interpretation.
The purposes of this study were: (1) to estimate test-retest reliability of a modified version of the Prosthetic Evaluation Questionnaire (PEQ), scales of a
version of the 36-Item Short-Form Health Survey questionnaire adapted for the
veteran population (SF-36V), the Orthotics and Prosthetics Users' Survey (OPUS),
the Patient-Specific Functional Scale (PSFS), the Two-Minute Walk Test, the
Six-Minute Walk Test, the Timed "Up & Go" Test, and the Amputee Mobility
Predictor; (2) to calculate minimal detectable change (MDC) of each measure; and
(3) to conduct item analysis of the modified PEQ. DESIGN: This was a multi-site
study with repeated measurements. METHODS: Forty-four patients with unilateral
lower-limb amputation participated. Participants were tested twice within 1 week.
We calculated test-retest reliability of each measure using intraclass
correlation coefficient (ICC [2,1]), estimated standard error of the measurement
and MDC, and assessed scale score distribution. RESULTS: The study demonstrated
strong test-retest reliability scores of performance measures (ICC=.83-.97)
suggesting that these measures are good choices for evaluation of people with
lower-limb amputation. Reliability of PEQ subscales (ICC=.41-.93) was comparable
to that reported in the literature (ICC=.56-.90). LIMITATIONS: This study
examined only statistically measurable differences and did not evaluate whether
changes in scores were clinically important. CONCLUSIONS: Minimal detectable
change scores can be used to determine whether change in test scores exceeds
measurement error associated with day-to-day variation. This is the first study
to present test-retest reliability data on the self-reported OPUS scales, the
PSFS in people with lower-limb amputations, and a new, easier-to-use scoring
mechanism for the PEQ.

Langue : ANGLAIS