Subjective Assessment of Videofluoroscopic Swallow Studies

Janet W. Lee, Derrick R. Randall, Lisa M. Evangelista, Maggie Kuhn, Peter C Belafsky

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Objective: The videofluoroscopic swallow study (VFSS) is the gold standard diagnostic tool to evaluate oropharyngeal dysphagia. Although objective measurements on VFSS have been described, there is no universal method of analysis, and the majority of clinicians use subjective interpretation alone. The purpose of this investigation was to evaluate the accuracy of subjective VFSS analysis. Study Design: Double-blinded experiment. Setting: Tertiary care laryngology center. Subjects and Methods: Seventy-six de-identified videos from VFSS evaluations of patients with dysphagia were presented to blinded, experienced speech-language pathologists and laryngologists individually. Evaluators rated each video as normal or abnormal for hyoid elevation (HE), pharyngeal area (PA), pharyngeal constriction ratio (PCR), and pharyngoesophageal segment opening (PESo). A blinded investigator assessed evaluators’ inter- and intrarater agreement and compared their responses to objectively measured results for these parameters to examine accuracy. Results: Evaluators correctly classified only 61.5% of VFSS videos as normal or abnormal, with moderate interrater agreement (κ = 0.48, P <.0001). Intrarater agreement was highly variable (κ = 0.43-0.83). Accuracy was greatest for PCR (71.6%), with poorer performance for HE (61.3%), PESo (59.2%), and PA (45.3%). Interrater agreement was moderate for all parameters, with greater concordance for PCR (κ = 0.59) and PESo (κ = 0.54) and less for HE (κ = 0.40) and PA (κ = 0.44). Evaluators unanimously agreed on a correct interpretation of a VFSS only 28% of the time. Conclusion: Subjective assessment of VFSS parameters is inconsistently accurate when compared with objective measurements, with accuracy ratings ranging from 45.3% to 71.6% for specific parameters. Inter- and intrarater reliability for subjective assessment was moderate and highly variable.

Original languageEnglish (US)
Pages (from-to)901-905
Number of pages5
JournalOtolaryngology - Head and Neck Surgery (United States)
Volume156
Issue number5
DOIs
StatePublished - May 1 2017

Keywords

  • deglutition
  • dynamic swallow study
  • dysphagia
  • fluoroscopic swallow study
  • MBS
  • modified barium swallow
  • objective measures
  • pharynx
  • reproducibility
  • VFSS

ASJC Scopus subject areas

  • Surgery
  • Otorhinolaryngology

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