Article

OBJECTIVE: To investigate the factor structure of the 12 item World Health
Organization Disability Assessment Schedule (WHODAS) 2.0.
DESIGN: Cross-sectional
cohort survey study. SETTING: Physical and Rehabilitation Medicine outpatient
university clinic. SUBJECTS:
The 408 consecutive patients with chronic
musculoskeletal pain. MAIN MEASURES: Exploratory and confirmatory factor
analysis. RESULTS: A two-factor model most accurately fit the observed data of
musculoskeletal pain patients (root mean square error of approximation 0.049,
relative Chi square value 1.99). Twelve WHODAS 2.0 items were distributed between
two factors with covariance between them of 0.8. The first factor contained
domains related mostly to physical functioning, while another was associated
mostly with social and cognitive functioning. There were a few differences
between single items in their importance in defining the variance within these
two factors. Of the six International Classification of Functioning, Disability
and Health domains belonging to the first construct, the ability to carry out
household responsibilities explained most, 84% of the total variance in this
construct. For the second factor, the ability to participate in community
activities seemed to be the most important, explaining 85% of the total variance
in this construct. CONCLUSIONS: In this study, the two-factor structure model of
the 12-item WODAS 2.0 demonstrated the most accurate fit within patients with
musculoskeletal pain conditions.

Langue : ANGLAIS