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Cross-cultural adaptation, reliability and validity of the Arabic version of the reduced Western Ontario and McMaster Universities Osteoarthritis index in patients with knee osteoarthritis.
Disabil Rehabil. 2016; 38(7):689-94.DR

Abstract

PURPOSE

We adapted the reduced Western Ontario and McMaster Universities Osteoarthritis (WOMAC) index for the Arabic language and tested its metric properties in patients with knee osteoarthritis (OA).

METHODS

One hundred and twenty-one consecutive patients who were referred for physiotherapy to the outpatient department were asked to answer the Arabic version of the reduced WOMAC index (ArWOMAC). After the completion of the ArWOMAC, the intensity of knee pain and general health status were assessed using the visual analog scale (VAS) and the 12-item short form health survey (SF-12), respectively. A second assessment was performed at least 48 h after the first session to assess test-retest reliability. The test-retest reliability was quantified using the intra-class correlation coefficient (ICC), and Cronbach's alpha was calculated to assess the internal consistency of the Arabic questionnaire. The construct validity was assessed using Spearman rank correlation coefficients.

RESULTS

The total ArWOMAC scale and pain and function subscales were internally consistent with Cronbach's coefficient alpha of 0.91, 0.89 and 0.90, respectively. Test-retest reliability was good to excellent with ICC of 0.91, 0.89 and 0.90, respectively. SF-12 and VAS score significantly correlated with ArWOMAC index (p < 0.01), which support the construct validity. The standard error of measurement (SEM) of the total scale was 2.94, based on repeated measurements for test-retest. The minimum detectable change based on the SEM for test-retest was 8.15.

CONCLUSIONS

The ArWOMAC index is a reliable and valid instrument for evaluating the severity of knee OA, with metric properties in agreement with the original version.

IMPLICATIONS FOR REHABILITATION

Although, the reduced WOMAC index has been clinically utilized within the Saudi population, the Arabic version of this instrument is not validated for an Arab population to measure lower limb functional disability caused by OA. The Arabic version of reduced WOMAC (ArWOMAC) index is a reliable and valid scale to measure lower limb functional disability in patients with knee OA. The ArWOMAC index could be suitable in Saudi Arabia and other Arab countries where the language, culture and the life style are similar.

Authors+Show Affiliations

a Rehabilitation Research Chair, College of Applied Medical Sciences, King Saud University , Riyadh , Saudi Arabia .a Rehabilitation Research Chair, College of Applied Medical Sciences, King Saud University , Riyadh , Saudi Arabia . b Padmashree Dr. D. Y. Patil College of Physiotherapy, Dr. D. Y. Patil Vidyapeeth , Pune , India , and.a Rehabilitation Research Chair, College of Applied Medical Sciences, King Saud University , Riyadh , Saudi Arabia .c Department of Orthopaedics , College of Medicine, King Saud University , Riyadh , Saudi Arabia.

Pub Type(s)

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

Language

eng

PubMed ID

26066566

Citation

Alghadir, Ahmad, et al. "Cross-cultural Adaptation, Reliability and Validity of the Arabic Version of the Reduced Western Ontario and McMaster Universities Osteoarthritis Index in Patients With Knee Osteoarthritis." Disability and Rehabilitation, vol. 38, no. 7, 2016, pp. 689-94.
Alghadir A, Anwer S, Iqbal ZA, et al. Cross-cultural adaptation, reliability and validity of the Arabic version of the reduced Western Ontario and McMaster Universities Osteoarthritis index in patients with knee osteoarthritis. Disabil Rehabil. 2016;38(7):689-94.
Alghadir, A., Anwer, S., Iqbal, Z. A., & Alsanawi, H. A. (2016). Cross-cultural adaptation, reliability and validity of the Arabic version of the reduced Western Ontario and McMaster Universities Osteoarthritis index in patients with knee osteoarthritis. Disability and Rehabilitation, 38(7), 689-94. https://doi.org/10.3109/09638288.2015.1055380
Alghadir A, et al. Cross-cultural Adaptation, Reliability and Validity of the Arabic Version of the Reduced Western Ontario and McMaster Universities Osteoarthritis Index in Patients With Knee Osteoarthritis. Disabil Rehabil. 2016;38(7):689-94. PubMed PMID: 26066566.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cross-cultural adaptation, reliability and validity of the Arabic version of the reduced Western Ontario and McMaster Universities Osteoarthritis index in patients with knee osteoarthritis. AU - Alghadir,Ahmad, AU - Anwer,Shahnawaz, AU - Iqbal,Zaheen Ahmed, AU - Alsanawi,Hisham Abdulaziz, Y1 - 2015/06/11/ PY - 2015/6/13/entrez PY - 2015/6/13/pubmed PY - 2016/10/13/medline KW - Arabic KW - knee KW - osteoarthritis KW - reduced WOMAC index KW - reliability KW - validity SP - 689 EP - 94 JF - Disability and rehabilitation JO - Disabil Rehabil VL - 38 IS - 7 N2 - PURPOSE: We adapted the reduced Western Ontario and McMaster Universities Osteoarthritis (WOMAC) index for the Arabic language and tested its metric properties in patients with knee osteoarthritis (OA). METHODS: One hundred and twenty-one consecutive patients who were referred for physiotherapy to the outpatient department were asked to answer the Arabic version of the reduced WOMAC index (ArWOMAC). After the completion of the ArWOMAC, the intensity of knee pain and general health status were assessed using the visual analog scale (VAS) and the 12-item short form health survey (SF-12), respectively. A second assessment was performed at least 48 h after the first session to assess test-retest reliability. The test-retest reliability was quantified using the intra-class correlation coefficient (ICC), and Cronbach's alpha was calculated to assess the internal consistency of the Arabic questionnaire. The construct validity was assessed using Spearman rank correlation coefficients. RESULTS: The total ArWOMAC scale and pain and function subscales were internally consistent with Cronbach's coefficient alpha of 0.91, 0.89 and 0.90, respectively. Test-retest reliability was good to excellent with ICC of 0.91, 0.89 and 0.90, respectively. SF-12 and VAS score significantly correlated with ArWOMAC index (p < 0.01), which support the construct validity. The standard error of measurement (SEM) of the total scale was 2.94, based on repeated measurements for test-retest. The minimum detectable change based on the SEM for test-retest was 8.15. CONCLUSIONS: The ArWOMAC index is a reliable and valid instrument for evaluating the severity of knee OA, with metric properties in agreement with the original version. IMPLICATIONS FOR REHABILITATION: Although, the reduced WOMAC index has been clinically utilized within the Saudi population, the Arabic version of this instrument is not validated for an Arab population to measure lower limb functional disability caused by OA. The Arabic version of reduced WOMAC (ArWOMAC) index is a reliable and valid scale to measure lower limb functional disability in patients with knee OA. The ArWOMAC index could be suitable in Saudi Arabia and other Arab countries where the language, culture and the life style are similar. SN - 1464-5165 UR - https://www.unboundmedicine.com/medline/citation/26066566/Cross_cultural_adaptation_reliability_and_validity_of_the_Arabic_version_of_the_reduced_Western_Ontario_and_McMaster_Universities_Osteoarthritis_index_in_patients_with_knee_osteoarthritis_ L2 - http://www.tandfonline.com/doi/abs/10.3109/09638288.2015.1055380 DB - PRIME DP - Unbound Medicine ER -