Article

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.

Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Fin-00014, Finland.
American Journal of Veterinary Research (impact factor: 1.27). 07/2009; 70(6):727-34. DOI:10.2460/ajvr.70.6.727
Source: PubMed

ABSTRACT 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.
61 client-owned dogs with osteoarthritis.
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.
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.
The Finnish version of the HCPI provided a valid, reliable, and responsive tool for assessment of response to treatment in dogs with osteoarthritis.

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    Myles Benjamin Walton, Emily Cowderoy, B Duncan X Lascelles, John F. Innes
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Keywords

11-item single
 
2 smaller groups
 
61 client-owned dogs
 
carprofen treatment group
 
Finnish version
 
HCPI correlated
 
Helsinki chronic pain index
 
internal consistency
 
intraclass correlation coefficient
 
mobility visual analogue scale
 
placebo control group
 
predictive validity
 
Principal component analysis
 
published chronic pain index
 
questionnaire 5 times
 
repeatability testing
 
responsive tool
 
Sensitivity testing
 
single stable component
 
test-retest reliability