title: Reliability and validity of the Turkish version of Activities-specific Balance Confidence scale in symptomatic knee osteoarthritis.
abstract: BACKGROUND
  Activities-specific Balance Confidence (ABC) scale is a well known tool to evaluate the functional balance. Balance impairment may accompany to knee osteoarthritis.
  
  
  OBJECTIVE
  The aim was to investigate the reliability and validity of the Turkish version of ABC in knee osteoarthritis.
  
  
  METHODS
  Forty-nine patients with knee osteoarthritis were included. All the participants were evaluated by ABC and Berg Balance Scale (BBS). Knee Injury and Osteoarthritis Outcome Score (KOOS) was used for the assessment of the knee related condition.
  
  
  RESULTS
  Mean age was 64.7 ± 9.2. Eighty-five percent was women. Mean ABC score was 53.5% and BBS score was 40. Interclass correlation coefficient was 0.95. There was a statistically significant positive correlation between the test-retest results (t= 1.90, p= 0.063). Correlation coefficient was high (p= 0.001, r= 0.953). Cronbach's alpha was 0.97. There was a significant positive correlation between ABC-T and BBS, the symptoms, daily living activities and quality of life subscales of KOOS (r= 0.555, p< 0.001; r= 0.424, r= 0.379, r= 0.621, p< 0.01). ABC-T correlated negatively with the radiological severity (r = -0.316, p< 0.05).
  
  
  CONCLUSIONS
  ABC-T is a reproducible test with excellent internal consistency and construct validity in knee osteoarthritis. Balance confidence was moderate and related with the symptoms, daily living activities, disease severity and quality of life.
authors.affiliation: Istanbul Physical Medicine and Rehabilitation Training Hospital, Istanbul, Turkey.
authors.forename: Nurdan
authors.initials: N
authors.lastname: Paker
authors.affiliation: Istanbul Physical Medicine and Rehabilitation Training Hospital, Istanbul, Turkey.
authors.forename: Derya
authors.initials: D
authors.lastname: Bugdayci
authors.affiliation: Istanbul Physical Medicine and Rehabilitation Training Hospital, Istanbul, Turkey.
authors.forename: Ufuk Basaran
authors.initials: UB
authors.lastname: Demircioglu
authors.affiliation: Istanbul Physical Medicine and Rehabilitation Training Hospital, Istanbul, Turkey.
authors.forename: Feride
authors.initials: F
authors.lastname: Sabirli
authors.affiliation: Public Health Department, University of Istanbul School of Medicine, Istanbul, Turkey.
authors.forename: Sevda
authors.initials: S
authors.lastname: Ozel
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007717:Knee / Q000503:physiopathology; D007719:Knee Joint / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology*; D004856:Postural Balance; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D014421:Turkey
keywords: Activities-specific Balance Confidence (ABC) scale; Turkish version; balance; knee osteoarthritis; reliability; validity