Evaluation of a Swedish version of the arthritis self-efficacy scale in people with fibromyalgia (FM)

The major purpose of this study was to determine the utility and
construct validity of the Swedish version of the Arthritis
Self-Efficacy Scale (ASES-S). Ninetynine women with
fibromyalgia (FS) were included in a randomized, controlled
trial of fibromyalgia efficacy-based self-management education
and physical training. Several self-report instruments were
used to evaluate the outcome of the intervention. Evidence of
construct validity of the ASES-S was revealed in the factor
analysis which produced a three factor solution similar to
previous results. Significant correlations between ASES-S and
pre and post health status measures were consistent with
theoretically derived hypotheses, further testifying to
construct validity. Multiple regression analyses confirmed
that pretest ASES-S was the strongest predictor of posttest
ASES-S. The results indicated that the intervention had
produced a significant change in ASES-S and that this positive
change in self-efficacy was associated with changes in health
status. In conclusion, this study has shown the ASES-S to be a
valid measure of treatment effects also for patients with FS.

Lomi C, Burckhardt C, Nordholm L, Bjelle A, Ekdahl C

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