Article

OBJECTIVES: To examine the construct validity of the International FItness Scale
(IFIS) (ie, self-reported fitness) against objectively measured physical fitness
in women with fibromyalgia and in healthy women; and to study the test-retest
reliability of the IFIS in women with fibromyalgia.
DESIGN: Cross-sectional
study. SETTING: Fibromyalgia patient support groups. PARTICIPANTS: Women with
fibromyalgia (n=413) and healthy women (controls) (n=195) for validity purposes
and women with fibromyalgia
(n=101) for the reliability study.
The total sample
was N=709. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Fitness level
was both self-reported (IFIS) and measured using performance-based fitness tests.
For the reliability study the IFIS was completed on 2 occasions, 1 week apart.
RESULTS: Women with fibromyalgia who reported average fitness had better measured
fitness than those reporting very poor fitness (all P<.001, except 6-minute walk
test where P<.05), with similar trends observed in healthy control women. The
test-retest reliability of the IFIS, as measured by the average weighted kappa,
was .45. CONCLUSIONS: The IFIS was able to identify women with fibromyalgia who
had very low fitness and distinguish them from those with higher fitness levels.
Furthermore, the IFIS was moderately reliable in women with fibromyalgia.
CI - Copyright (c) 2016 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS