Clinimetric properties of WOMAC index in Greek knee osteoarthritis patients: comparisons with both self-reported and physical performance measures

Papathanasiou, George, Stasi, Sophia, Oikonomou, Leon, Roussou, Ioanna, Papageorgiou, Effie, Chronopoulos, Efstathios, Korres, Nectarios and Bellamy, Nicholas (2014) Clinimetric properties of WOMAC index in Greek knee osteoarthritis patients: comparisons with both self-reported and physical performance measures. Rheumatology International, 35 1: 115-123. doi:10.1007/s00296-014-3043-x


Author Papathanasiou, George
Stasi, Sophia
Oikonomou, Leon
Roussou, Ioanna
Papageorgiou, Effie
Chronopoulos, Efstathios
Korres, Nectarios
Bellamy, Nicholas
Title Clinimetric properties of WOMAC index in Greek knee osteoarthritis patients: comparisons with both self-reported and physical performance measures
Journal name Rheumatology International   Check publisher's open access policy
ISSN 0172-8172
1437-160X
Publication date 2014-05-29
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s00296-014-3043-x
Open Access Status
Volume 35
Issue 1
Start page 115
End page 123
Total pages 9
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2015
Language eng
Abstract This observational study aimed to examine the clinimetric properties of the Greek for Greece translation of the Western Ontario and McMaster Osteoarthritis Index (WOMAC®). One hundred and twenty-three patients with knee osteoarthritis (mean age 69.5 years) participated in the study. An extensive reliability study was carried out to assess WOMAC's internal consistency and repeatability (8-day interval). In addition, we examined the construct (convergent, nomological and known-groups) and criterion-related (concurrent and predictive) validity of the index against both self-report [SF-36 and combined visual analog/faces pain scale-revised (VAS/FPS-R)] and physical performance measures [timed up and go test (TUG)]. The internal consistency of the WOMAC subscales ranged from high (0.804) to excellent (0.956). Intra-class correlation coefficients for test-retest reliability were excellent, ranging from 0.91 to 0.95. Partial correlation analysis, adjusted for age and use of an assistive device, showed that WOMAC scores were significantly associated with all validation criteria, presenting fair to strong (-0.33 to -0.86) correlation coefficients. WOMAC-function was strongly associated with SF36-function (-0.86) and TUG (0.71), WOMAC-pain to VAS/FPS-R (0.71) and SF36-pain (-0.67). Of all WOMAC outcomes, stiffness subscale had the lowest, though still significant, correlations with all validation criteria. Multiple linear regression analyses indicated that WOMAC-function was a significant factor for TUG, WOMAC-pain for VAS/FPS-R and both for SF36-function and SF36-pain. The WOMAC LK3.1 Greek for Greece Index is a reliable and valid assessment tool for the evaluation of individuals with knee osteoarthritis, showing excellent reliability and significant validity properties.
Keyword Knee osteoarthritis
SF-36
TUG test
VAS scale
WOMAC® index
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Medicine Publications
 
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