title: Psychometric testing of the Helsinki chronic pain index by completion of a questionnaire in Finnish by owners of dogs with chronic signs of pain caused by osteoarthritis.
abstract: OBJECTIVE
  To determine the validity, reliability, and sensitivity of a published chronic pain index by completion of a questionnaire in Finnish by owners of dogs with chronic signs of pain caused by osteoarthritis.
  
  
  METHODS
  61 client-owned dogs with osteoarthritis.
  
  
  METHODS
  Validity, internal consistency, and repeatability testing of the questionnaire were evaluated by completion of questions in Finnish by owners of 61 dogs; the questionnaire was named the Helsinki chronic pain index (HCPI). Sensitivity testing of the questionnaire was determined from data of 2 smaller groups of dogs treated with carprofen (n = 17) or placebo (17). Owners completed the questionnaire 5 times during a 16-week period. Psychometric properties of the HCPI were evaluated.
  
  
  RESULTS
  Principal component analysis yielded only a single stable component, indicating that the HCPI was best explained as an 11-item single construct index of chronic pain. Changes in the HCPI correlated well with change in quality of life and with change in the mobility visual analogue scale (r = 0.72 and r = 0.67, respectively), indicating a high predictive validity. Internal consistency (Cronbach A value = 0.82) and test-retest reliability (intraclass correlation coefficient = 0.84 for items and 0.92 for the HCPI) were high. Changes in scores (from baseline to treatment and back to no treatment) between the carprofen treatment group and placebo control group were significant, indicating high sensitivity.
  
  
  CONCLUSIONS
  The Finnish version of the HCPI provided a valid, reliable, and responsive tool for assessment of response to treatment in dogs with osteoarthritis.
authors.affiliation: Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Fin-00014, Finland.
authors.forename: Anna K
authors.initials: AK
authors.lastname: Hielm-Björkman
authors.forename: Hannu
authors.initials: H
authors.lastname: Rita
authors.forename: Riitta-Mari
authors.initials: RM
authors.lastname: Tulamo
mesh_terms: D000818:Animals; D002908:Chronic Disease; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D005387:Finland; D006801:Humans; D007802:Language; D010003:Osteoarthritis / Q000473:pathology / Q000662:veterinary*; D010146:Pain / Q000662:veterinary*; D010147:Pain Measurement / Q000662:veterinary*; D011594:Psychometrics / Q000592:standards*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires