title: Visual analogue scale foot and ankle: validity and reliability of Thai version of the new outcome score in subjective form.
abstract: BACKGROUND
  Nowadays, measuring score in the form of subjective questionnaires is the important tool for clinical evaluation of the foot and ankle-related problems. VisualAnalogue Scale-Foot and Ankle (VAS-FA) is the newly developed subjective questionnaire, which has sufficiency of validity and reliability from a previous study
  
  
  OBJECTIVE
  Translate the original English version of VAS-FA into the Thai version and evaluate the validity and reliability of Thai VAS-FA in patients with foot and ankle-related problems.
  
  
  METHODS
  According to the forward-backward translation protocol, original VAS-FA was translated into the Thai version. Thai VAS-FA and validated Thai Short Form-36 (SF-36) questionnaires were distributed to 42 Thai patients to complete. For validation, Thai VAS-FA scores were correlated with SF-36 scores. For reliability, the test-retest reliability and internal consistency were analyzed.
  
  
  RESULTS
  Thai VAS-FA score demonstrated the sufficient correlations with physical functioning (PF), role physical (RP), bodily pain (BP) domains, and total score of SF-36 (statistically significant with p < 0.001 level and r > 0.5 values). The result of reliability revealed highly intra-class correlation coefficient as 0.995 from test-retest study. The internal consistency was excellent with Cronbach alpha: 0.995.
  
  
  CONCLUSIONS
  The original VAS-FA score is a well-validated, subjective, visual-analogue-scale based outcome score. The Thai version of VAS-FA form maintained the validity and reliability of the original version. This newly translated-validated score can be distributed for the evaluation of the functions, symptoms, and limitation of activities in Thai patients with foot and ankle problems.
authors.affiliation: Department of Orthopaedic Surgery, Faculty of Medicine, Thammasat Hospital, Thammasat University, Pathum Thani, Thailand. chatthara@yahoo.com
authors.forename: Chayanin
authors.initials: C
authors.lastname: Angthong
authors.forename: Bancha
authors.initials: B
authors.lastname: Chernchujit
authors.forename: Thongchai
authors.initials: T
authors.lastname: Suntharapa
authors.forename: Thossart
authors.initials: T
authors.lastname: Harnroongroj
mesh_terms: D000328:Adult; D000368:Aged; D000842:Ankle / Q000503:physiopathology*; D004185:Disability Evaluation; D005260:Female; D005528:Foot / Q000503:physiopathology*; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000503:physiopathology; D017063:Outcome Assessment, Health Care; D010147:Pain Measurement; D011594:Psychometrics / Q000706:statistics & numerical data; D011788:Quality of Life; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*; D014175:Translating