Journal Article

The Development and Psychometric Evaluation of a Supplementary Index Score of the Neuropsychological Assessment Battery Screening Module that is Sensitive to Traumatic Brain Injury

David Hacker, Christopher A. Jones, Zoe Clowes, Antonio Belli, Zhangjie Su, Murugan Sitaraman, David Davies, Ross Taylor, Elizabeth Flahive, Clare Travis, Nicci O'Neil and Yvonne Pettigrew

in Archives of Clinical Neuropsychology

Published on behalf of National Academy of Neuropsychology

Volume 32, issue 2, pages 215-227
Published in print March 2017 | ISSN: 0887-6177
Published online October 2016 | e-ISSN: 1873-5843 | DOI: https://dx.doi.org/10.1093/arclin/acw087
The Development and Psychometric Evaluation of a Supplementary Index Score of the Neuropsychological Assessment Battery Screening Module that is Sensitive to Traumatic Brain Injury

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Abstract

Objective

This study examines the validity of the NAB Screening Module (screening module of the neuropsychological assessment battery, S-NAB) in an acute traumatic brain injury (TBI) inpatient population and provides psychometric evaluation of an original index sensitive to TBI impairment.

Method

The utility of the S-NAB as a TBI screen was examined using a between groups design. One-hundred and four patients with mild complicated to severe TBI were recruited from a consecutive cohort of patients admitted as inpatients to a UK Major Trauma Centre. Ninety-eight control participants were selected from the S-NAB normative sample. All TBI patients completed the S-NAB during their inpatient stay.

Results

Control participants scored significantly higher than TBI participants on the Total Screening index (t = 3.626, p < 0.01), The Attention index (t = 7.882, p < 0.01), and the Executive index (t = 5.577, p < 0.01). A briefer TBI Impairment index of six subtests was constructed which accurately discriminated TBI patients from normative controls (t = 9.9, p < 0.01; Cohen's d = 1.54). The TBI index had excellent classification accuracy (AUC = 0.83), superior to that of the standard S-NAB indices. The TBI Index, Attention Index, and Total Screening Index demonstrated increasing impairment with increased severity of injury.

Conclusions

The S-NAB TBI index is a robust, reliable screening index for use with acute TBI patients, which is sensitive to the effects of acute TBI. It affords a briefer cognitive screen than the S-NAB and demonstrates a dose response relationship to TBI severity.

Keywords: Neuropsychological assessment battery; Neuropsychological assessment; Traumatic brain injury; Screening test

Journal Article.  6565 words.  Illustrated.

Subjects: Neuroscience ; Neuropsychology

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