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Validation of Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients scheduled for total knee replacement.
Qual Life Res. 2008 May; 17(4):595-601.QL

Abstract

OBJECTIVE

Our aim was to cross-culturally validate Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients with knee osteoarthritis (OA) scheduled for total knee replacement in Singapore.

METHODS

Chinese WOMAC was translated from the original English version following standard guidelines. Patients were asked to complete a questionnaire containing the WOMAC (twice within 6 days), the Short Form 36 (SF-36), and the EuroQoL EQ-5D. Reliability was assessed using Cronbach's alpha and intraclass correlation coefficients (ICC), dimensionality using item-to-domain correlations and factor analyses. Convergent and discriminant construct validity was assessed using six each a priori hypotheses.

RESULTS

Chinese WOMAC was well accepted by the patients in the pilot test. The Chinese and English versions were therefore administered to a consecutive sample of 131 Chinese- and 127 English-speaking subjects, respectively, with knee OA. Cronbach's alpha exceeded 0.7 for all domains except for Chinese pain domain, whereas the ICC exceeded 0.7 for all domains. Hypothesized item-to-domain correlations were observed for all items except for four items in Chinese physical function domain. The factor analyses yielded seven and five factors with eigenvalues of more than 1.0 in the Chinese and English versions, respectively. A total of 10/12 a priori construct validity hypotheses were satisfied for the Chinese version. Weak correlations between WOMAC pain and SF-36 bodily pain and moderate correlation between WOMAC pain and EQ-5D anxiety/depression were observed.

CONCLUSIONS

Chinese WOMAC was well accepted and demonstrated acceptable psychometric properties in Singaporean patients with severe knee OA.

Authors+Show Affiliations

Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada. fengxie@mcmaster.caNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

18415706

Citation

Xie, Feng, et al. "Validation of Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in Patients Scheduled for Total Knee Replacement." Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, vol. 17, no. 4, 2008, pp. 595-601.
Xie F, Li SC, Goeree R, et al. Validation of Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients scheduled for total knee replacement. Qual Life Res. 2008;17(4):595-601.
Xie, F., Li, S. C., Goeree, R., Tarride, J. E., O'Reilly, D., Lo, N. N., Yeo, S. J., Yang, K. Y., & Thumboo, J. (2008). Validation of Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients scheduled for total knee replacement. Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 17(4), 595-601. https://doi.org/10.1007/s11136-008-9340-7
Xie F, et al. Validation of Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in Patients Scheduled for Total Knee Replacement. Qual Life Res. 2008;17(4):595-601. PubMed PMID: 18415706.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validation of Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients scheduled for total knee replacement. AU - Xie,Feng, AU - Li,Shu-Chuen, AU - Goeree,Ron, AU - Tarride,Jean-Eric, AU - O'Reilly,Daria, AU - Lo,Ngai-Nung, AU - Yeo,Seng-Jin, AU - Yang,Kuang-Ying, AU - Thumboo,Julian, PY - 2007/10/03/received PY - 2008/03/30/accepted PY - 2008/4/17/pubmed PY - 2008/10/9/medline PY - 2008/4/17/entrez SP - 595 EP - 601 JF - Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation JO - Qual Life Res VL - 17 IS - 4 N2 - OBJECTIVE: Our aim was to cross-culturally validate Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients with knee osteoarthritis (OA) scheduled for total knee replacement in Singapore. METHODS: Chinese WOMAC was translated from the original English version following standard guidelines. Patients were asked to complete a questionnaire containing the WOMAC (twice within 6 days), the Short Form 36 (SF-36), and the EuroQoL EQ-5D. Reliability was assessed using Cronbach's alpha and intraclass correlation coefficients (ICC), dimensionality using item-to-domain correlations and factor analyses. Convergent and discriminant construct validity was assessed using six each a priori hypotheses. RESULTS: Chinese WOMAC was well accepted by the patients in the pilot test. The Chinese and English versions were therefore administered to a consecutive sample of 131 Chinese- and 127 English-speaking subjects, respectively, with knee OA. Cronbach's alpha exceeded 0.7 for all domains except for Chinese pain domain, whereas the ICC exceeded 0.7 for all domains. Hypothesized item-to-domain correlations were observed for all items except for four items in Chinese physical function domain. The factor analyses yielded seven and five factors with eigenvalues of more than 1.0 in the Chinese and English versions, respectively. A total of 10/12 a priori construct validity hypotheses were satisfied for the Chinese version. Weak correlations between WOMAC pain and SF-36 bodily pain and moderate correlation between WOMAC pain and EQ-5D anxiety/depression were observed. CONCLUSIONS: Chinese WOMAC was well accepted and demonstrated acceptable psychometric properties in Singaporean patients with severe knee OA. SN - 0962-9343 UR - https://www.unboundmedicine.com/medline/citation/18415706/Validation_of_Chinese_Western_Ontario_and_McMaster_Universities_Osteoarthritis_Index__WOMAC__in_patients_scheduled_for_total_knee_replacement_ L2 - https://doi.org/10.1007/s11136-008-9340-7 DB - PRIME DP - Unbound Medicine ER -