Study of the Reliability and Validity of the WOMAC Index in Patients with Total Knee Replacement (무릎관절 전치환술 환자에 대한 WOMAC 지수의 신뢰도와 타당성에 관한 연구)

Hoon Jo (조훈); Kyoung Kim (김경); Sang-Cheol Im (임상철)

Study of the Reliability and Validity of the WOMAC Index in Patients with Total Knee Replacement

Journal of the Korean Society of Physical Medicine
Abbr : J Korean Soc Phys Med
2023, 18(2), pp.93-101
Publisher : The Korean Society of Physical Medicine
Research Area : Medicine and Pharmacy > Physical Therapy > Other physical therapy
Received : February 17, 2023
Accepted : March 7, 2023
Published : May 31, 2023

Hoon Jo ¹, Kyoung Kim ¹, Sang-Cheol Im ¹

¹대구대학교

Accredited

ABSTRACT

PURPOSE: The Western Ontario and McMaster Universities Arthritis (WOMAC) index has been used to measure the outcome of total knee replacement (TKR), but studies on its reliability and validity are limited. The present study examined the reliability and validity of this index for patients with knee osteoarthritis who underwent TKR. METHODS: Seventy-one inpatients and outpatients who underwent bilateral TKR for knee osteoarthritis were included in this study. The pain assessment scale and WOMAC index were used to evaluate the participants every two weeks to examine the test–retest reliability, internal consistency, and construct validity. RESULTS: The test–retest reliability scores for pain, stiffness, and physical function were .75–.92, .85–.90, and .75 –.95, respectively. The corresponding intraclass correlation coefficients were .75–.88, .76–.88, and .71–.95, respectively. The internal consistency score in the first and second examinations was .92. Furthermore, the construct validity scores for pain, stiffness, and physical function were .83, .41, and .58, respectively. CONCLUSION: The application of the WOMAC index in patients who underwent TKR showed high test–retest reliability and internal consistency with the use of the WOMAC index and good validity with the use of the pain assessment scale.

KEYWORDS

Construct validity, Osteoarthritis, Reliability, TKR, WOMAC index

Citation status

* References for papers published after 2023 are currently being built.

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Journal of the Korean Society of Physical Medicine 2023 KCI Impact Factor : 0.45