Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric study
Abstract Background Knee osteoarthritis (OA) represents a heavy burden for patients and the society as a whole. The Oxford Knee Score (OKS) is a well known tool to assess the quality of life in patients with Knee OA. The purpose of this study was to analyze the psychometric properties of the Spanish...
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| Format: | Article |
| Language: | English |
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BMC
2017-09-01
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| Series: | Health and Quality of Life Outcomes |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12955-017-0761-2 |
| _version_ | 1818905149667540992 |
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| author | Jesús Martín-Fernández Roberto García-Maroto Fco Javier Sánchez-Jiménez Alonso Bau-González Homero Valencia-García Blanca Gutiérrez-Teira Juan Carlos Arenaza Lidia García-Pérez Renata Linertová Amaia Bilbao |
| author_facet | Jesús Martín-Fernández Roberto García-Maroto Fco Javier Sánchez-Jiménez Alonso Bau-González Homero Valencia-García Blanca Gutiérrez-Teira Juan Carlos Arenaza Lidia García-Pérez Renata Linertová Amaia Bilbao |
| author_sort | Jesús Martín-Fernández |
| collection | DOAJ |
| description | Abstract Background Knee osteoarthritis (OA) represents a heavy burden for patients and the society as a whole. The Oxford Knee Score (OKS) is a well known tool to assess the quality of life in patients with Knee OA. The purpose of this study was to analyze the psychometric properties of the Spanish version of the OKS, including its reliability, validity, and responsiveness. Methods Prospective observational study that included 397 patients diagnosed with knee OA according to the criterion of the American Rheumatism Association, which were recruited in 3 different Spanish regions. Their self-perceived health-related quality of life (HRQL) was assessed through 3 questionnaires: a generic one (the EQ-5D-5 L) and two specific ones adapted to Spanish (the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) and the Oxford Knee Score (OKS). The follow-up period was 6 months, and the acceptability of the OKS was evaluated, together with its psychometric properties, presence of ceiling and floor effects, validity, reliability, and sensitivity to change. Results The OKS was fully answered in 99.5% of cases, with no evidence of ceiling or floor effects. Its factor structure can be explained in a single dimension. Its discriminating capacity was very good compared to the groups generated by the WOMAC and the EQ-5D-5 L. The correlation of the OKS with the dimensions of the latter questionnaires was around 0.7. The test-retest reliability was excellent (ICC 0.993; CI 95%: 0.990–0.995) and so was its internal consistency (Cronbach’s α = 0.920). The effect size was 0.7 for moderate improvements in the HQRL, which is similar to that of the dimensions of the WOMAC and greater than for the EQ-5D-5 L. The minimum clinically significant difference that was detected by the questionnaire was 6.1 points, and the minimum detectable change was 4.4 points. Conclusions The Spanish-adapted version of the OKS is a useful, valid tool for assessing the perceived HRQL in patients suffering from knee OA, with psychometric properties similar to the WOMAC, and that allows for discriminating the patient’s condition at a particular moment as well as for appraising changes over time. |
| first_indexed | 2024-12-19T21:18:45Z |
| format | Article |
| id | doaj.art-81a9dad1459a4af18317698a728aff67 |
| institution | Directory Open Access Journal |
| issn | 1477-7525 |
| language | English |
| last_indexed | 2024-12-19T21:18:45Z |
| publishDate | 2017-09-01 |
| publisher | BMC |
| record_format | Article |
| series | Health and Quality of Life Outcomes |
| spelling | doaj.art-81a9dad1459a4af18317698a728aff672022-12-21T20:05:17ZengBMCHealth and Quality of Life Outcomes1477-75252017-09-0115111110.1186/s12955-017-0761-2Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric studyJesús Martín-Fernández0Roberto García-Maroto1Fco Javier Sánchez-Jiménez2Alonso Bau-González3Homero Valencia-García4Blanca Gutiérrez-Teira5Juan Carlos Arenaza6Lidia García-Pérez7Renata Linertová8Amaia Bilbao9C° Villamanta (C.S. Navalcarnero). Gerencia Asistencial de Atención Primaria. Servicio Madrileño de SaludServicio de Traumatología. Hospital Universitario Clínico San Carlos. Servicio Madrileño de SaludC.S. Gregorio Marañón. Gerencia Asistencial de Atención Primaria. Servicio Madrileño de SaludServicio de Traumatología. Hospital Universitario Rey Juan CarlosServicio de Traumatología. Hospital Universitario Fundación AlcorcónC. S. El Soto. Gerencia Asistencial de Atención Primaria. Servicio Madrileño de SaludRed de Investigación en Servicios de Salud en Enfermedades CrónicasRed de Investigación en Servicios de Salud en Enfermedades CrónicasRed de Investigación en Servicios de Salud en Enfermedades CrónicasRed de Investigación en Servicios de Salud en Enfermedades CrónicasAbstract Background Knee osteoarthritis (OA) represents a heavy burden for patients and the society as a whole. The Oxford Knee Score (OKS) is a well known tool to assess the quality of life in patients with Knee OA. The purpose of this study was to analyze the psychometric properties of the Spanish version of the OKS, including its reliability, validity, and responsiveness. Methods Prospective observational study that included 397 patients diagnosed with knee OA according to the criterion of the American Rheumatism Association, which were recruited in 3 different Spanish regions. Their self-perceived health-related quality of life (HRQL) was assessed through 3 questionnaires: a generic one (the EQ-5D-5 L) and two specific ones adapted to Spanish (the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) and the Oxford Knee Score (OKS). The follow-up period was 6 months, and the acceptability of the OKS was evaluated, together with its psychometric properties, presence of ceiling and floor effects, validity, reliability, and sensitivity to change. Results The OKS was fully answered in 99.5% of cases, with no evidence of ceiling or floor effects. Its factor structure can be explained in a single dimension. Its discriminating capacity was very good compared to the groups generated by the WOMAC and the EQ-5D-5 L. The correlation of the OKS with the dimensions of the latter questionnaires was around 0.7. The test-retest reliability was excellent (ICC 0.993; CI 95%: 0.990–0.995) and so was its internal consistency (Cronbach’s α = 0.920). The effect size was 0.7 for moderate improvements in the HQRL, which is similar to that of the dimensions of the WOMAC and greater than for the EQ-5D-5 L. The minimum clinically significant difference that was detected by the questionnaire was 6.1 points, and the minimum detectable change was 4.4 points. Conclusions The Spanish-adapted version of the OKS is a useful, valid tool for assessing the perceived HRQL in patients suffering from knee OA, with psychometric properties similar to the WOMAC, and that allows for discriminating the patient’s condition at a particular moment as well as for appraising changes over time.http://link.springer.com/article/10.1186/s12955-017-0761-2Quality of lifeHealth statusOsteoarthritis, kneeValidation studies |
| spellingShingle | Jesús Martín-Fernández Roberto García-Maroto Fco Javier Sánchez-Jiménez Alonso Bau-González Homero Valencia-García Blanca Gutiérrez-Teira Juan Carlos Arenaza Lidia García-Pérez Renata Linertová Amaia Bilbao Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric study Health and Quality of Life Outcomes Quality of life Health status Osteoarthritis, knee Validation studies |
| title | Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric study |
| title_full | Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric study |
| title_fullStr | Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric study |
| title_full_unstemmed | Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric study |
| title_short | Validation of the Spanish version of the Oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis: a multicentric study |
| title_sort | validation of the spanish version of the oxford knee score and assessment of its utility to characterize quality of life of patients suffering from knee osteoarthritis a multicentric study |
| topic | Quality of life Health status Osteoarthritis, knee Validation studies |
| url | http://link.springer.com/article/10.1186/s12955-017-0761-2 |
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