Article

OBJECTIVE: To determine the dimensionality, reliability, model fit, adequacy of
the qualifier levels, response patterns across different factors, and targeting
of the International Classification of Functioning, Disability and Health (ICF)
osteoarthritis core set categories in people with osteoarthritis undergoing hip
and knee arthroplasty. METHODS: The osteoarthritis core set was rated in 316
persons with osteoarthritis who were either in the pre-operative or within one
year post-operative stage. Rasch analyses were performed using the RUMM 2030
program. RESULTS: Twelve of the 13 body functions categories and 13 of the 19
activity and participation categories had good model fit. The qualifiers
displayed disordered thresholds necessitating rescoring. There was uneven spread
of ICF categories across the full range of the patients' scores indicating
off--targeting. Subtest analysis of the reduced ICF categories of body functions
and activity and participation showed that the two components could be integrated
to form one measure. CONCLUSION: The results suggest that it is possible to
measure functioning using a unidimensional construct based on ICF osteoarthritis
core set categories of body functions and activity and participation in this
population. However, omission of some categories and reduction in qualifier
levels are necessary. Further studies are needed to determine whether better
targeting is achieved, particularly during the pre-operative and during the
sub-acute care period.

Langue : ANGLAIS