A new scale for assessing patients with vertebrobasilar stroke-the Israeli Vertebrobasilar Stroke Scale (IVBSS): Inter-rater reliability and concurrent validity

Alexander Y. Gur, Yair Lampl, Bella Gross, Vladimir Royter, Ludmila Shopin, Natan M. Bornstein

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: Most of existing stroke scoring systems have limited ability to evaluate patients with cerebrovascular events in the vertebrobasilar territory. We devised a new scale, the Israeli Vertebrobasilar Stroke Scale (IVBSS) in order to directly and more accurately assess clinical deficits of patients with vertebrobasilar stroke. The present study measured the reliability and validity of the IVBSS. Patients and methods: Forty-three patients (mean age ± S.D., 70.9 ± 8.8 years, 27 males) with vertebrobasilar stroke were evaluated with the IVBSS (11 items), the NIH Stroke Scale (NIHSS) and the disability modified Rankin Scale (mRS) by independent examiners. Interobserver agreement was rated by weighted kappa statistics for each item and the total IVBSS score. Validity was examined with Spearman rank coefficients to compare the IVBSS with NIHSS and mRS. Results: Excellent reliability was demonstrated between the examiners for almost each item and the total score of the IVBSS (kappa > 0.75). The total IVBSS score was strongly associated with NIHSS and mRS results (r = 0.80 and 0.76, respectively; P < 0.0002). Conclusions: The IVBSS is a valid instrument that allows the assessment of patients with vertebrobasilar stroke with high reliability. Further observations are warranted to determine the predictive value of the IVBSS for stroke outcome.

Original languageEnglish
Pages (from-to)317-322
Number of pages6
JournalClinical Neurology and Neurosurgery
Volume109
Issue number4
DOIs
StatePublished - May 2007
Externally publishedYes

Keywords

  • Modified Rankin Scale
  • NIH Stroke Scale
  • Neurological score
  • Reliability
  • Stroke assessment
  • Validity
  • Vertebrobasilar stroke

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