Article

Abstract Introduction. Self-efficacy is one of the most powerful determinants of
behaviour change. To increase effectiveness of joint protection (JP) education,
it may be important to address perceptions of JP self-efficacy directly. The aim
of this study was to develop a scale to measure JP self-efficacy (JP-SES) in
people with rheumatoid arthritis (RA). Methods. Instrument development included
item generation, construct validity, and reliability testing. Rasch analysis was
applied to determine construct validity and the revised JP-SES was tested again
to confirm validity and establish test-retest reliability and internal
consistency. Results. A total of 46 items were generated by literature review,
occupational therapists, and people with RA. After semi-structured interviews and
field-testing with RA participants, a 26-item questionnaire draft was constructed
and tested. Rasch analysis to determine construct validity reduced the JP-SES to
13 items with good overall fit values. Rasch analysis of confirmatory validity
resulted in a final 10-item version of the JP-SES. Test-retest results supported
the validity of the scale, with high internal consistency (alpha = 0.92) and good
test-retest reliability (r(s) = 0.79; p < 0.001). Conclusions. The JP-SES is a
valid and reliable scale to assess perceived ability of people with RA to apply
JP methods. The JP-SES could help stimulate the use of efficacy-enhancing methods
in JP education.

Langue : ANGLAIS