Journal of the Korean Society of Physical Medicine (대한물리의학회지)

The Korean Society of Physical Medicine (대한물리의학회)
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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 (Department of Rehabilitation Sciences, Graduate School, Daegu University) ;
  • Kyoung Kim (Department of Physical Therapy, College of Rehabilitation Sciences, Daegu University) ;
  • Sang-Cheol Im (Department of Rehabilitation Sciences, Graduate School, Daegu University)
  • 조훈 (대구대학교 일반대학원 재활과학과) ;
  • 김경 (대구대학교 재활과학대학 물리치료학과) ;
  • 임상철 (대구대학교 일반대학원 재활과학과)
  • Received : 2023.02.17
  • Accepted : 2023.03.07
  • Published : 2023.05.31
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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.

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References

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