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Year : 2018  |  Volume : 18  |  Issue : 2  |  Page : 63-69

Translation and psychometric evaluation of the yoruba version of quadruple visual analogue scale

1 Department of Medical Rehabilitation, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
2 Department of Health Professions, Faculty of Health, Psychology and Social Care, Manchester Metropolitan University, Manchester, England, United Kingdom
3 Department of Physiotherapy, Ladoke Akintola University of Technology Teaching Hospital, Osogbo, Nigeria
4 Department of Physiotherapy, College of Medicine, University of Ibadan, Ibadan, Nigeria
5 Department of Physiotherapy, Federal Medical Centre, Abeokuta, Nigeria
6 Department of Physiotherapy, Federal Medical Centre, Ido-Ekiti, Nigeria
7 Department of Physiotherapy, Faculty of Allied Health Sciences, University of Medical Sciences, Ondo, Nigeria

Correspondence Address:
Dr. C E Mbada
Department of Medical Rehabilitation, College of Health Sciences, Obafemi Awolowo University, Ile-Ife
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/njhs.njhs_4_20

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Context: Wide application of the Quadruple Visual Analogue Scale (QVAS) is hamstrung by dearth or lack of its translations into other languages. Aims: This study was aimed to translate and determine the psychometric properties of the Yoruba version of the QVAS (QVAS-Y). Materials and Methods: The translation process involved forward-translation, synthesis, back-translation, expert review and pre-final testing. The English QVAS and QVAS-Y were administered to 100 consenting patients with chronic low back pain to determine the validity of the new translation, while 51 of the respondents completed the QVAS-Y again after 7 days for test–retest reliability. The Oswestry Disability Index was used to test its external validity. Data were analysed using descriptive and inferential statistics. Alpha level was set at P < 0.05. Results: The concurrent validity score for QVAS-Y was r = 0.896, P = 0.001, and ranges between 0.465 (lowest) and 0.856 (highest) for items 4 and 1, respectively. The QVAS-Y has moderate external validity (r = 0.341; P = 0.001) and its reliability value was 0.622 and ranges between 0.465 and 0.668 per item. The Cronbach's alpha for the QVAS-Y was 0.767 and ranges between 0.635 and 0.801 per item. Conclusion: The concurrent validity, reliability and internal consistency of the QVAS-Y are adequate to assess pain among Yoruba population.

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