Rasch analysis of the Neck Bournemouth Questionnaire to measure disability related to XXXX .

@entity1 @entity4048 @entity8876
OBJECTIVE: To determine the psychometric properties of the Neck Bournemouth Questionnaire in @entity1 with @entity4048 , using Rasch analysis. METHODS: A sample of 161 subjects with @entity4048 was assessed with the Neck Bournemouth Questionnaire. Before performing Rasch analysis, we examined the structure of the scale with factor analysis. The goodness-of-fit of the data to the model, thresholds ordering, unidimensionality, local independence of the items, differential item functioning, @entity1 separation index, and mean @entity1 's location were assessed. RESULTS: Both exploratory and confirmatory factor analyses supported the presence of 2 factors. Only Factor 1 needed a modification (item 7 removal) in order to achieve the fit to the Rasch model (  2   =   10.65, df 8, p   =   0.22). The @entity1 separation index was 0.80 and the mean location of @entity1 0.48 (standard deviation (SD) 1.02). @entity8876 (items 4 and 5) fitted the model without modifications (  2   =   3.86, df 4, p   =   0.42). Its @entity1 separation index and mean @entity1 's location were, respectively, 0.77 and -0.71 (SD 1.57). CONCLUSION: The Neck Bournemouth Questionnaire with the purposed modification may provide useful clinical profiles and change scores of subjects with @entity4048 for research purposes.
