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Original Articles

Measuring outcome from Vestibular Rehabilitation, Part I: Qualitative development of a new self-report measure

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Pages 169-177 | Received 28 Sep 2007, Published online: 07 Jul 2009
 

Abstract

Research suggests that Vestibular Rehabilitation (VR) is an effective treatment for dizziness, but there is currently no measure specifically designed to assess treatment outcome. A review of existing self-report measures of dizziness indicates that no measure has been designed for longitudinal application and all suffer from limitations which restrict their usefulness in measuring VR outcome. A need for a psychometrically robust patient-oriented measure of quality of life benefit from VR is identified. The aim of the present study was to explore dimensions relevant to VR with a view to developing a measure of outcome. Eighteen adults receiving VR participated in interviews about the quality of life impact of dizziness. Qualitative analysis revealed 64 themes describing self-perceived quality of life impact. Themes were developed into potential questionnaire items and 35 were selected to represent the quality of life impact of dizziness in a prototype questionnaire. A quarter of items in the prototype questionnaire refer to issues not addressed by existing measures; the remaining items draw together issues covered by the range of questionnaires currently in use.

Abbreviations
DBS=

Dizziness Beliefs Scale

DFI=

Dizzy Factor Inventory

DHI=

Dizziness Handicap Inventory

UCLA-DQ=

University of California, Los Angeles-Dizziness Questionnaire

VADL=

Vestibular Disorders Activities of Daily Living

VHQ=

Vertigo Handicap Questionnaire

VR=

Vestibular Rehabilitation

VSS=

Vertigo Symptom Scale

Abbreviations
DBS=

Dizziness Beliefs Scale

DFI=

Dizzy Factor Inventory

DHI=

Dizziness Handicap Inventory

UCLA-DQ=

University of California, Los Angeles-Dizziness Questionnaire

VADL=

Vestibular Disorders Activities of Daily Living

VHQ=

Vertigo Handicap Questionnaire

VR=

Vestibular Rehabilitation

VSS=

Vertigo Symptom Scale

Sumario

Las investigaciones sugieren que la rehabilitación vestibular (VR) es un tratamiento efectivo para el mareo, pero actualmente no hay una medición específicamente diseñada para evaluar el resultado del tratamiento. Una revisión de las mediciones actuales de auto-evaluación, indica que ninguna medición ha sido diseñada para su aplicación longitudinal y que todas tienen limitaciones que restringen su utilidad para medir el resultado de la VR. Se identificó la necesidad de una medición psicométrica, robusta, orientada al paciente, sobre el beneficio que aporta la VR en la calidad de vida. El propósito de este estudio fue explorar los alcances relativos a la VR, con la mirada puesta en el desarrollo de una medición de resultados. Dieciocho adultos en VR participaron en entrevistas sobre el impacto que tiene el mareo en la calidad de vida. Un análisis cualitativo integró 64 temas que describen el impacto auto-percibido en la calidad de vida. Los temas se convirtieron en ítems de un potencial cuestionario y se seleccionaron 35 para representar un cuestionario prototipo sobre el impacto del mareo en la calidad de vida. Un cuarto de los ítems en el cuestionario prototipo se refieren a temas que no se consideran en las mediciones existentes; el resto de ellos describen en su conjunto temas ya cubiertos por cuestionarios actualmente en uso.

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