The neurological outcome scale for traumatic brain injury (NOS-TBI): II. Reliability and convergent validity

Stephen R. McCauley, Elisabeth A. Wilde, Tara M. Kelly, Annie M. Weyand, Ragini Yallampalli, Eric J. Waldron, Claudia Pedroza, Kathleen P. Schnelle, Corwin Boake, Harvey S. Levin, Paolo Moretti

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A standardized measure of neurological dysfunction specifically designed for TBI currently does not exist and the lack of assessment of this domain represents a substantial gap. To address this, the Neurological Outcome Scale for Traumatic Brain Injury (NOS-TBI) was developed for TBI outcomes research through the addition to and modification of items specifically relevant to patients with TBI, based on the National Institutes of Health Stroke Scale. In a sample of 50 participants (mean age = 33.3 years, SD = 12.9) ≤18 months (mean = 3.1, SD = 3.2) following moderate (n = 8) to severe (n = 42) TBI, internal consistency of the NOS-TBI was high (Cronbach's alpha = 0.942). Test-retest reliability also was high (ρ = 0.97, p < 0.0001), and individual item kappas between independent raters were excellent, ranging from 0.83 to 1.0. Overall inter-rater agreement between independent raters (Kendall's coefficient of concordance) for the NOS-TBI total score was excellent (W = 0.995). Convergent validity was demonstrated through significant Spearman rank-order correlations between the NOS-TBI and the concurrently administered Disability Rating Scale (ρ = 0.75, p < 0.0001), Rancho Los Amigos Scale (ρ =-0.60, p < 0.0001), Supervision Rating Scale (ρ = 0.59, p < 0.0001), and the FIM (ρ =-0.68, p < 0.0001). These results suggest that the NOS-TBI is a reliable and valid measure of neurological functioning in patients with moderate to severe TBI.

Original languageEnglish (US)
Pages (from-to)991-997
Number of pages7
JournalJournal of neurotrauma
Volume27
Issue number6
DOIs
StatePublished - Jun 1 2010

Keywords

  • Neurological Outcome Scale for Traumatic Brain Injury
  • convergent validity
  • outcome
  • reliability
  • traumatic brain injury

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