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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/29537

Title: The Development of a Short Measure of Physical Function for Hip OA. HOOS- Physical Function Short-form (HOOS-PS) – An OARSI/OMERACT Initiative
Authors: Davis, AM
Perruccio, AV
Canizares, M
Tennant, A
Hawker, GA
Conaghan, PG
Roos, EM
Jordan, JM
Maillefert, JF
Dougados, M
Lohmander, LS
Keywords: Osteoarthritis, Physical function, Outcome measure, Rasch analysis
Issue Date: 2008
Publisher: Osteoarthritis and Cartilage
Citation: Osteoarthritis and Cartilage, 2008; 16:551-559
Abstract: Objective: To derive a cross-culturally valid, short measure of physical function using function subscales (daily living and sports and recreation) of the Hip disability and Osteoarthritis Outcome Score (HOOS). Methods: Rasch analysis was conducted on data from individuals from multiple countries who had hip osteoarthritis (OA). Fit of the data to the Rasch model was evaluated by model c2 and item fit statistics (c2, size of residual, and F-test). Differential item functioning was evaluated by gender, age and country. Unidimensionality was evaluated by factor analysis of residuals. Individual data sets were analyzed and data pooled and re-analyzed for fit to the model. Regression modeling was conducted to derive a nomogram converting raw summed scores to Rasch derived interval scores. Results: Seven data sets were included (n ¼ 2991), ages 19e96 years, male/female ratio was 1:1.23. The final model included five HOOS items. From the easiest to most difficult, the items (logit) were as follows: sitting (1.832), descending stairs (0.729), getting in/out of bath or shower (0.255), twisting/pivoting on loaded leg ( 0.221) and running ( 2.595). The separation index was 0.80.
URI: http://hdl.handle.net/1807/29537
Appears in Collections:UofT Faculty publications

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