title: Evaluation of the Turkish version of the Dougados functional index in ankylosing spondylitis.
abstract: 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.
  
  
  CONCLUSIONS
  the Turkish version of DFI has good reliability, validity and reproducibility, confirming its utility for trials in Turkish AS patients.
authors.affiliation: Department of Rheumatology-Immunology, Faculty of Medicine, Cukurova University, Balcali 01330, Adana, Turkey. teozer@cu.edu.tr
authors.forename: Huseyin T E
authors.initials: HT
authors.lastname: Ozer
authors.forename: Tunay
authors.initials: T
authors.lastname: Sarpel
authors.forename: Bozkurt
authors.initials: B
authors.lastname: Gulek
authors.forename: Z Nazan
authors.initials: ZN
authors.lastname: Alparslan
authors.forename: Eren
authors.initials: E
authors.lastname: Erken
mesh_terms: D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D000368:Aged; D003431:Cross-Cultural Comparison; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013167:Spondylitis, Ankylosing / Q000145:classification / Q000175:diagnosis* / Q000503:physiopathology*; D014177:Translations; D014421:Turkey
references.citation: J Rheumatol. 1999 Apr;26(4):980-4
references.pmid: 10229432
references.citation: J Rheumatol. 1999 Apr;26(4):961-5
references.pmid: 10229428
references.citation: J Rheumatol. 1994 Dec;21(12):2281-5
references.pmid: 7699629
references.citation: Clin Rheumatol. 2000;19(6):464-9
references.pmid: 11147757
references.citation: Clin Rheumatol. 2005 Apr;24(2):123-8
references.pmid: 15340866
references.citation: Arthritis Rheum. 1984 Apr;27(4):361-8
references.pmid: 6231933
references.citation: Clin Exp Rheumatol. 2003 Jul-Aug;21(4):451-8
references.pmid: 12942696
references.citation: J Rheumatol. 1999 Apr;26(4):951-4
references.pmid: 10229426
references.citation: J Rheumatol. 1988 Feb;15(2):302-7
references.pmid: 3283358
references.citation: Z Rheumatol. 1999 Aug;58(4):218-25
references.pmid: 10502022
references.citation: Can Med Assoc J. 1937 Jun;36(6):608-10
references.pmid: 20320644