Abstract
The proposed number of factors to extract depended on the method employed. Velicer’s Minimum Average Partial test suggested one factor, the Cattell’s scree test and parallel analysis suggested two factors, and the second eigenvalue of 1.04 also suggested two factors. Exploratory factor analysis demonstrated that the 2-factor OHS had most of the items saliently loading either of the two factors. These factors were named ‘Pain’ and ‘Function’ and their respective subscales were created. Cronbach’s alpha was 0.90 for the 12-item summary scale, 0.85 for the 6-item ‘Function’ subscale, and 0.82 for the 6-item ‘Pain’ subscale. Confirmatory factor analysis demonstrated that the 2 factor model of the OHS had somewhat better fit. However, none of the one factor or two factor models was rejected.
Highlights
The aim of this study was to explore dimensionality of the Oxford Hip Score (OHS) and examine if pain and self-reported functioning can be distinguished from the OHS in the form of subscales
Exploratory factor analysis demonstrated that the 2-factor OHS had most of the items saliently loading either of the two factors
Confirmatory factor analysis demonstrated that the 2 factor model of the OHS had somewhat better fit
Summary
An exploratory and confirmatory analysis of the oxford hip score: generation of subscales assessing self-reported function and pain. From 2nd Clinical Trials Methodology Conference: Methodology Matters Edinburgh, UK. Aims The aim of this study was to explore dimensionality of the Oxford Hip Score (OHS) and examine if pain and self-reported functioning can be distinguished from the OHS in the form of subscales
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