Katina Swan1, Reinie Cordier2,3, Ted Brown4, Renée Speyer2,5,6. 1. School of Occupational Therapy, Speech Pathology and Social Work, Curtin University, Kent Street, Bentley, 6102, WA, Australia. katina.swan@postgrad.curtin.edu.au. 2. School of Occupational Therapy, Speech Pathology and Social Work, Curtin University, Kent Street, Bentley, 6102, WA, Australia. 3. Northumbria University, Room B014, Coach Lane Campus, Newcastle upon Tyne, NE7 7XA, United Kingdom. 4. Department of Occupational Therapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University - Peninsula Campus, Frankston, 3800, VIC, Australia. 5. Department of Special Needs Education, University of Oslo, P.O. Box 1072 Blindern, Oslo, 0316, Norway. 6. Department of Otorhinolaryngology and Head and Neck Surgery, Leiden University Medical Centre, Rapenburg 70, Leiden, 2311 EZ, The Netherlands.
Abstract
INTRODUCTION: The Videofluoroscopic Swallow Study (VFSS) is a commonly used dysphagia assessment that is routinely analysed visuoperceptually. However, no consensus exists regarding which visuoperceptual measures should be used to analyse VFSSs. Current visuoperceptual measures for VFSSs are limited by poor quality and incomplete or indeterminate psychometric properties. OBJECTIVE: This study aimed to establish the content validity for a new visuoperceptual VFSS measure for oropharyngeal dysphagia in adults, by identifying relevant domains of the construct and generating items and corresponding response scales. METHODS: Consensus among experts in dysphagia and VFSS from over 20 countries was achieved across three rounds of anonymous online surveys, using the Delphi technique. Participants judged relevance and comprehensiveness of definitions of visuoperceptual domains of VFSS and the relevance of various domains to the overall construct. After reaching consensus on definitions of relevant domains, consensus on items were established using the same process. RESULTS: Participants achieved consensus on definitions of 32 domains recommended for analysis, and at least one item per domain (range 1-4). Domains selected by participants included both those which occur in existing measures and domains which have not been included in any measures to date. This study will form the basis for content validity of a new measure for VFSS. CONCLUSIONS: This first phase of developing a visuoperceptual measure of VFSS resulted in the identification of 32 domains and 60 items for oropharyngeal dysphagia. Developers can now advance to the next phase of measure construction; prototype development and psychometric testing.
INTRODUCTION: The Videofluoroscopic Swallow Study (VFSS) is a commonly used dysphagia assessment that is routinely analysed visuoperceptually. However, no consensus exists regarding which visuoperceptual measures should be used to analyse VFSSs. Current visuoperceptual measures for VFSSs are limited by poor quality and incomplete or indeterminate psychometric properties. OBJECTIVE: This study aimed to establish the content validity for a new visuoperceptual VFSS measure for oropharyngeal dysphagia in adults, by identifying relevant domains of the construct and generating items and corresponding response scales. METHODS: Consensus among experts in dysphagia and VFSS from over 20 countries was achieved across three rounds of anonymous online surveys, using the Delphi technique. Participants judged relevance and comprehensiveness of definitions of visuoperceptual domains of VFSS and the relevance of various domains to the overall construct. After reaching consensus on definitions of relevant domains, consensus on items were established using the same process. RESULTS:Participants achieved consensus on definitions of 32 domains recommended for analysis, and at least one item per domain (range 1-4). Domains selected by participants included both those which occur in existing measures and domains which have not been included in any measures to date. This study will form the basis for content validity of a new measure for VFSS. CONCLUSIONS: This first phase of developing a visuoperceptual measure of VFSS resulted in the identification of 32 domains and 60 items for oropharyngeal dysphagia. Developers can now advance to the next phase of measure construction; prototype development and psychometric testing.
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