A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability Study
Background: In handball, the kinematics of the frontal plane seem to be one of the most important factors for the development of lower limb injuries. The knee valgus angle is a fundamental axis for injury prevention and is usually measured with 2D systems such as Kinovea software (Version 0.9.4.). T...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Healthcare |
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| Online Access: | https://www.mdpi.com/2227-9032/11/9/1258 |
| _version_ | 1797602660713496576 |
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| author | Luis Ceballos-Laita Xavier Marimon Albert Masip-Alvarez Sara Cabanillas-Barea Sandra Jiménez-del-Barrio Andoni Carrasco-Uribarren |
| author_facet | Luis Ceballos-Laita Xavier Marimon Albert Masip-Alvarez Sara Cabanillas-Barea Sandra Jiménez-del-Barrio Andoni Carrasco-Uribarren |
| author_sort | Luis Ceballos-Laita |
| collection | DOAJ |
| description | Background: In handball, the kinematics of the frontal plane seem to be one of the most important factors for the development of lower limb injuries. The knee valgus angle is a fundamental axis for injury prevention and is usually measured with 2D systems such as Kinovea software (Version 0.9.4.). Technological advances such as computer vision have the potential to revolutionize sports medicine. However, the validity and reliability of computer vision must be evaluated before using it in clinical practice. The aim of this study was to analyze the test-retest and inter-rater reliability and the concurrent validity of a beta version app based on computer vision for the measurement of knee valgus angle in elite handball athletes. Methods: The knee valgus angle of 42 elite handball athletes was measured. A frontal photo during a single-leg squat was taken, and two examiners measured the angle by the beta application based on computer vision at baseline and at one-week follow-up to calculate the test-retest and inter-rater reliability. A third examiner assessed the knee valgus angle using 2D Kinovea software to calculate the concurrent validity. Results: The knee valgus angle in the elite handball athletes was 158.54 ± 5.22°. The test-retest reliability for both examiners was excellent, showing an Intraclass Correlation Coefficient (ICC) of 0.859–0.933. The inter-rater reliability showed a moderate ICC: 0.658 (0.354–0.819). The standard error of the measurement with the app was stated between 1.69° and 3.50°, and the minimum detectable change was stated between 4.68° and 9.70°. The concurrent validity was strong r = 0.931; <i>p</i> < 0.001. Conclusions: The computer-based smartphone app showed an excellent test-retest and inter-rater reliability and a strong concurrent validity compared to Kinovea software for the measurement of the knee valgus angle. |
| first_indexed | 2024-03-11T04:18:46Z |
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| institution | Directory Open Access Journal |
| issn | 2227-9032 |
| language | English |
| last_indexed | 2024-03-11T04:18:46Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Healthcare |
| spelling | doaj.art-f8eef58ad1d24310948e2231a4d4fa8b2023-11-17T22:57:30ZengMDPI AGHealthcare2227-90322023-04-01119125810.3390/healthcare11091258A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability StudyLuis Ceballos-Laita0Xavier Marimon1Albert Masip-Alvarez2Sara Cabanillas-Barea3Sandra Jiménez-del-Barrio4Andoni Carrasco-Uribarren5Department of Surgery, Ophthalmology, Otorhinolaryngology and Physical Therapy, Faculty of Health Sciences, University of Valladolid, 42004 Soria, SpainBioengineering Institute of Technology, Universitat Internacional de Catalunya (UIC), 08195 Barcelona, SpainAutomatic Control Department, Universitat Politècnica de Catalunya (UPC-BarcelonaTECH), 08034 Barcelona, SpainDepartment of Physiotherapy, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya (UIC), C/Josep Trueta s/n, 08195 Sant Cugat del Vallès, SpainDepartment of Surgery, Ophthalmology, Otorhinolaryngology and Physical Therapy, Faculty of Health Sciences, University of Valladolid, 42004 Soria, SpainDepartment of Physiotherapy, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya (UIC), C/Josep Trueta s/n, 08195 Sant Cugat del Vallès, SpainBackground: In handball, the kinematics of the frontal plane seem to be one of the most important factors for the development of lower limb injuries. The knee valgus angle is a fundamental axis for injury prevention and is usually measured with 2D systems such as Kinovea software (Version 0.9.4.). Technological advances such as computer vision have the potential to revolutionize sports medicine. However, the validity and reliability of computer vision must be evaluated before using it in clinical practice. The aim of this study was to analyze the test-retest and inter-rater reliability and the concurrent validity of a beta version app based on computer vision for the measurement of knee valgus angle in elite handball athletes. Methods: The knee valgus angle of 42 elite handball athletes was measured. A frontal photo during a single-leg squat was taken, and two examiners measured the angle by the beta application based on computer vision at baseline and at one-week follow-up to calculate the test-retest and inter-rater reliability. A third examiner assessed the knee valgus angle using 2D Kinovea software to calculate the concurrent validity. Results: The knee valgus angle in the elite handball athletes was 158.54 ± 5.22°. The test-retest reliability for both examiners was excellent, showing an Intraclass Correlation Coefficient (ICC) of 0.859–0.933. The inter-rater reliability showed a moderate ICC: 0.658 (0.354–0.819). The standard error of the measurement with the app was stated between 1.69° and 3.50°, and the minimum detectable change was stated between 4.68° and 9.70°. The concurrent validity was strong r = 0.931; <i>p</i> < 0.001. Conclusions: The computer-based smartphone app showed an excellent test-retest and inter-rater reliability and a strong concurrent validity compared to Kinovea software for the measurement of the knee valgus angle.https://www.mdpi.com/2227-9032/11/9/1258athleteskinematicscomputer-visionvalidity study |
| spellingShingle | Luis Ceballos-Laita Xavier Marimon Albert Masip-Alvarez Sara Cabanillas-Barea Sandra Jiménez-del-Barrio Andoni Carrasco-Uribarren A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability Study Healthcare athletes kinematics computer-vision validity study |
| title | A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability Study |
| title_full | A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability Study |
| title_fullStr | A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability Study |
| title_full_unstemmed | A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability Study |
| title_short | A Beta Version of an Application Based on Computer Vision for the Assessment of Knee Valgus Angle: A Validity and Reliability Study |
| title_sort | beta version of an application based on computer vision for the assessment of knee valgus angle a validity and reliability study |
| topic | athletes kinematics computer-vision validity study |
| url | https://www.mdpi.com/2227-9032/11/9/1258 |
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