Article

A new 13-item rating scale, the Self-Reported Impairments in Persons
with Late Effects of Polio (SIPP), has been developed.
The SIPP has been analyzed
using the Rasch method and has shown good construct validity and internal
consistency. To establish its clinical utility, further evaluation of its
psychometric properties is needed. OBJECTIVE: To evaluate the test-retest
reliability of the SIPP and to define limits for the smallest change that
indicates a real change, both for a group of persons and a single individual.
DESIGN: A postal survey. SETTING: University Hospital. PARTICIPANTS: Fifty-one
persons (31 men and 20 women; mean age, 72 years) with clinically verified late
effects of polio. INTERVENTION: Not applicable. MAIN OUTCOME MEASUREMENTS: The
participants completed the SIPP twice, 2 weeks apart. The response frequencies at
test occasion 1 (T1) and test occasion 2 (T2) were calculated. Test-retest
reliability was analyzed using the percentage agreement of each item, the
intraclass correlation coefficient, and the mean difference between the test
occasions (d), together with the 95% confidence intervals for d, the standard
error of measurement, the smallest real difference, and a Bland-Altman plot.
RESULTS: The percentage agreement (ie, the same scoring at both test occasions)
was >70% for 10 of 13 items. The mean score (standard deviation) was 27.9 (5.7)
points at T1 and 28.2 (6.0) points at T2, with no systematic difference between
the test occasions. The intraclass correlation coefficient was 0.88, the standard
error of measurement (the smallest change for a group of persons) was 2.0 points,
and the smallest real difference (the smallest change for a single individual)
was 5.6 points, respectively. CONCLUSION: The SIPP is a reliable rating scale in
persons with late effects of polio and can be used to evaluate effects of
rehabilitation interventions and changes of perceived impairments over time both
for a group of persons and for a single individual.
CI - Copyright (c) 2016 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS