UNLABELLED: To investigate the reliability and validity of the Turkish version of the Dougados functional index (DFI) in patients with ankylosing spondylitis (AS). The Turkish version of DFI was obtained after a translation and back-translation process. Seventy consecutive patients with AS were enrolled. Patients were requested to complete the questionnaire on the day of admission (first visit), a second time within 24 h after admission (second visit), and on a third occasion. Reliability, validity and reproducibility of the Turkish version of the index were assessed. All the items showed significant correlations with the total index score with r-values ranging from 0.516 to 0.817. Cronbach alpha score was calculated as 0.908. Significant correlations were found between the total DFI score and Schober test (r=-0.293, P<0.05), occiput-wall distance (r=0.384; P<0.01) finger-to-floor distance (r=0.450, P<0.001), chest expansion (r=-0.331, P<0.01) and Dougados articular index (r=0.352, P<0.05). Good correlations were found between individual DFI items and the total score (r=between 0.533 and 0.882, p< 0.001) for the first and second visits, showing good reproducibility of the index. CONCLUSION: the Turkish version of DFI has good reliability, validity and reproducibility, confirming its utility for trials in Turkish AS patients.
UNLABELLED: To investigate the reliability and validity of the Turkish version of the Dougados functional index (DFI) in patients with ankylosing spondylitis (AS). The Turkish version of DFI was obtained after a translation and back-translation process. Seventy consecutive patients with AS were enrolled. Patients were requested to complete the questionnaire on the day of admission (first visit), a second time within 24 h after admission (second visit), and on a third occasion. Reliability, validity and reproducibility of the Turkish version of the index were assessed. All the items showed significant correlations with the total index score with r-values ranging from 0.516 to 0.817. Cronbach alpha score was calculated as 0.908. Significant correlations were found between the total DFI score and Schober test (r=-0.293, P<0.05), occiput-wall distance (r=0.384; P<0.01) finger-to-floor distance (r=0.450, P<0.001), chest expansion (r=-0.331, P<0.01) and Dougados articular index (r=0.352, P<0.05). Good correlations were found between individual DFI items and the total score (r=between 0.533 and 0.882, p< 0.001) for the first and second visits, showing good reproducibility of the index. CONCLUSION: the Turkish version of DFI has good reliability, validity and reproducibility, confirming its utility for trials in Turkish AS patients.
Authors: A Spoorenberg; D van der Heijde; E de Klerk; M Dougados; K de Vlam; H Mielants; H van der Tempel; S van der Linden Journal: J Rheumatol Date: 1999-04 Impact factor: 4.666
Authors: A Spoorenberg; D van der Heijde; E de Klerk; M Dougados; K de Vlam; H Mielants; H van der Tempel; S van der Linden Journal: J Rheumatol Date: 1999-04 Impact factor: 4.666
Authors: M H Cardiel; J D Londoño; E Gutiérrez; C Pacheco-Tena; J Vázquez-Mellado; R Burgos-Vargas Journal: Clin Exp Rheumatol Date: 2003 Jul-Aug Impact factor: 4.473