The Reliability of the Vestibular autorotation test (VAT) in patients with dizziness

Philip J. Blatt, Michael C Schubert, Kathryn E. Roach, Ronald J. Tusa

Research output: Contribution to journalArticle

Abstract

Objective: To establish intrarater and interrater reliability of the Vestibular Autorotation Test (VAT) (Western Systems Research Inc., Pasadena, CA) in a clinical sample of individuals reporting dizziness. Study Design: Ninety-eight patients with reports of dizziness referred for vestibular function testing performed repeated trials of horizontal VAT. A subsample of 49 individuals repeated the test for a second rater. Results: Approximately 66% of subjects were unable to meet the performance criterion of six consecutive trials where data was displayed at frequencies ≥3.9 Hz with coherence values held constant trial to trial. There was a good level of intrarater reliability for gain independent of the effects of practice (intraclass correlation coefficient [ICC] = 0.78 [95% confidence interval [CI]: 0.69-0.87] to 0.95 [(95% CI: 0.93-0.97]). A significant difference in intrarater reliability was found when the first three trials were compared to the last three trials for phase (ICC ranged from 0.04 [95% CI: 0.00-0.31] to 0.96 [95% CI: 0.93-0.97]) and asymmetry (ICC ranged from 0.39 [95% CI: 0.17-0.56] to 0.73 [95% CI: 0.32-0.81]) particularly at frequencies ≥4.3 Hz. Interrater reliability was good to excellent across all variables at frequencies

Original languageEnglish (US)
Pages (from-to)70-79
Number of pages10
JournalJournal of Neurologic Physical Therapy
Volume32
Issue number2
DOIs
StatePublished - Jun 2008

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Dizziness
Confidence Intervals
Research

Keywords

  • Dizziness
  • Reliability
  • Vestibular function testing
  • Vestibular hypofunction
  • Vestibulo-ocular reflex

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation
  • Clinical Neurology

Cite this

The Reliability of the Vestibular autorotation test (VAT) in patients with dizziness. / Blatt, Philip J.; Schubert, Michael C; Roach, Kathryn E.; Tusa, Ronald J.

In: Journal of Neurologic Physical Therapy, Vol. 32, No. 2, 06.2008, p. 70-79.

Research output: Contribution to journalArticle

Blatt, Philip J. ; Schubert, Michael C ; Roach, Kathryn E. ; Tusa, Ronald J. / The Reliability of the Vestibular autorotation test (VAT) in patients with dizziness. In: Journal of Neurologic Physical Therapy. 2008 ; Vol. 32, No. 2. pp. 70-79.
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