A DUTCH VERSION OF THE FUNCTIONAL INDEX FOR ANKYLOSING SPONDYLITIS: DEVELOPMENT AND VALIDATION IN A LONG-TERM STUDY
A Dutch Functional Index (DFI) for AS has been developed, containing 37 questions in essence this is a modification of a French index with additional questions. Internal consistency, reproducibility, criterion and construct validity and sensitivity to change were studied in different groups of AS patients. In a group of 149 patients the questionnaire was completed and internal consistency calculated (Cronbach's α = 0.94) after exclusion of three items. Reproducibility was studied in 39 patients with stable disease; Pearson correlation was 0.94. Criterion validity, against a ‘gold standard’ i.e... Mehr ...
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Dokumenttyp: | TEXT |
Erscheinungsdatum: | 1994 |
Verlag/Hrsg.: |
Oxford University Press
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Schlagwörter: | ARTICLES |
Sprache: | Englisch |
Permalink: | https://search.fid-benelux.de/Record/base-27024855 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | http://rheumatology.oxfordjournals.org/cgi/content/short/33/9/842 |
A Dutch Functional Index (DFI) for AS has been developed, containing 37 questions in essence this is a modification of a French index with additional questions. Internal consistency, reproducibility, criterion and construct validity and sensitivity to change were studied in different groups of AS patients. In a group of 149 patients the questionnaire was completed and internal consistency calculated (Cronbach's α = 0.94) after exclusion of three items. Reproducibility was studied in 39 patients with stable disease; Pearson correlation was 0.94. Criterion validity, against a ‘gold standard’ i.e. experts' observation of 25 items, was studied in 19 patients; r = 0.85. In a 48-week NSAID study patients were enrolled after a washout period: DFI scores before and after treatment showed significant improvement ( P <0.02). There were 187 DFI with corresponding clinical measurements, correlations varied from –0.30 to 0.68. Estimated measurement-remeasurement correlation was 0.87. The DFI is, thus, a potentially useful instrument, which is valid, reliable and sensitive to the effects of NSAID treatment.