Association of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) with Muscle Strength in Community-Dwelling Elderly with Knee Osteoarthritis

Mi-Ji Kim, Byeong-Hun Kang, Soo-Hyun Park, Bokyoung Kim, Gyeong-Ye Lee, Young-Mi Seo, Ki-Soo Park and Jun-Il Yoo
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Mi-Ji Kim: Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju 52725, Korea
Byeong-Hun Kang: Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju 52725, Korea
Soo-Hyun Park: Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju 52725, Korea
Bokyoung Kim: Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju 52725, Korea
Gyeong-Ye Lee: Center for Farmer’s Safety and Health, Gyeongsang National University Hospital, Jinju 52725, Korea
Young-Mi Seo: Center for Farmer’s Safety and Health, Gyeongsang National University Hospital, Jinju 52725, Korea
Ki-Soo Park: Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju 52725, Korea
Jun-Il Yoo: Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju 52725, Korea

IJERPH, 2020, vol. 17, issue 7, 1-11

Abstract: Purpose: The purpose of this study was to evaluate the correlation between muscle strength and knee symptoms (pain, stiffness, and functional limitation) regardless of the presence of radiologic knee osteoarthritis (RKOA) in community-dwelling elderly. Patients and methods: This cross-sectional study used data from the Namgaram-2 cohort. The Namgaram-2 cohort consisted of participants living in three rural communities. Such participants were included for studies on activity limitation due to age-related musculoskeletal disorders including knee osteoarthritis, osteoporosis, and sarcopenia. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), a health assessment tool for patients with arthritis in lower extremities, was used to assess health-related quality of life (HRQOL). Muscle strengths were measured by knee strength (by using the isokinetic dynamometer) and hand grip strength. Results: The WOMAC pain of Kallgren–Lawrence (K/L) grade < 2 was correlated with age, grip strength, nutrition status, and knee extension 180 peak torque. The WOMAC pain of K/L grade ≥ 2 was correlated with age, nutrition status, and knee extension 60 peak torque. The WOMAC stiffness of K/L grade < 2 was correlated with having a spouse, nutrition status, and knee extension 60 peak torque. The WOMAC stiffness of K/L grade ≥ 2 was correlated with knee extension 60 peak torque. The WOMAC function of K/L grade < 2 was correlated with age, grip strength, osteoporosis, nutrition status, and knee extension 180 peak torque. The WOMAC function of K/L grade ≥ 2 was correlated with age, nutrition status, and knee extension 60 peak torque. Conclusion: Muscle strength as measured by grip strength and knee extension was statistically significantly correlated with the WOMAC scores in patients with knee symptoms regardless of whether radiologic signs of knee osteoarthritis were observed.

Keywords: muscle strength; WOMAC; osteoarthritis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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