Yonsei Med J.  2020 Mar;61(3):251-256. 10.3349/ymj.2020.61.3.251.

Validation of the Western Ontario and McMaster Universities Arthritis Index Short Form (WOMAC-SF) and Its Relevance to Disability and Frailty

• Park SH
• Kang BH
• Kim MJ
• Kim B
• Lee GY
• Seo YM
• Yoo JI
• Park KS

• KMID: 2470922
• DOI: http://doi.org/10.3349/ymj.2020.61.3.251

Abstract

PURPOSE
This study aimed to evaluate the validity of the Western Ontario and McMaster Universities Arthritis Index Short Form (WOMAC-SF) for the assessment of musculoskeletal disorders. We evaluated whether WOMAC-SF correlated with the World Health Organization Disability Assessment Schedule 12 (WHODAS-12) and Kaigo-Yobo questionnaires for assessing health-outcomes in Korea.
MATERIALS AND METHODS
This cross-sectional study used data from the Namgaram-2 cohort. WOMAC, WOMAC-SF, WHODAS-12, and Kaigo-Yobo questionnaires were administered to patients with musculoskeletal disorders, including radiology-confirmed knee osteoarthritis (RKOA), sarcopenia, and osteoporosis. The relationships among WOMAC-SF, WHODAS-12, and Kaigo-Yobo scores were analyzed by stepwise multiple regression analysis.
RESULTS
WOMAC-SF was associated with the WOMAC questionnaire. The results of confirmatory factor analysis for the hypothesized model with two latent factors, pain and function, provided satisfactory fit indices. WOMAC-SF pain and function were associated with RKOA. Kaigo-Yobo was associated with WOMAC-SF pain (B=0.140, p=0.001) and WOMAC-SF function (B=0.042, p=0.004). WHODAS-12 was associated with WOMAC-SF pain (B=0.679, p=0.003) and WOMAC-SF function (B=0.804, p<0.001).
CONCLUSION
WOMAC-SF was validated for the evaluation of low extremity musculoskeletal disorders and health-related quality of life in a community-based population. Furthermore, we confirmed that WOMAC-SF were reflective of disability and frailty, which affect health outcomes.

Keyword

WOMAC; musculoskeletal disorders; disability; frailty

MeSH Terms

Appointments and Schedules
Arthritis*
Cohort Studies
Cross-Sectional Studies
Extremities
Humans
Korea
Ontario*
Osteoarthritis, Knee
Osteoporosis
Quality of Life
Sarcopenia
World Health Organization

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