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Arch Clin Neuropsychol. 2014 Aug;29(5):432-41. doi: 10.1093/arclin/acu020. Epub 2014 May 9.

Detecting cognitive impairment after concussion: sensitivity of change from baseline and normative data methods using the CogSport/Axon cognitive test battery.

Author information

1
Melbourne School of Psychological Sciences, The University of Melbourne, Parkville, VIC, Australia.
2
CogState Ltd., Melbourne, VIC, Australia Child Study Center, Yale University, New Haven, CT, USA.
3
CogState Ltd., Melbourne, VIC, Australia.
4
The Florey Institute of Neuroscience and Mental Health, Melbourne Brain Centre - Austin Campus, Heidelberg, VIC, Australia.
5
CogState Ltd., Melbourne, VIC, Australia The Florey Institute of Neuroscience and Mental Health, Melbourne Brain Centre - Austin Campus, Heidelberg, VIC, Australia pmaruff@cogstate.com.
6
The Florey Institute of Neuroscience and Mental Health, Melbourne Brain Centre - Austin Campus, Heidelberg, VIC, Australia Centre For Health Exercise and Sports Medicine, Melbourne Physiotherapy Department, The University of Melbourne, Parkville, VIC, Australia.

Abstract

Concussion-related cognitive impairments are typically evaluated with repeated neuropsychological assessments where post-injury performances are compared with pre-injury baseline data (baseline method). Many cases of concussions, however, are evaluated in the absence of baseline data by comparing post-injury performances with normative data (normative method). This study aimed to compare the sensitivity and specificity of these two methods using the CogSport/Axon test battery. Normative data and reliable change indices were computed from a non-injured athlete sample (n = 235). Test-retest data from non-injured (n = 260) and recently concussed (n = 29) athlete samples were then used to compare the two methods. The baseline method was found to be more sensitive than the normative method, and both methods had high specificity and overall correct classification rates. This suggests that while the normative method identifies most cases of recent concussions, the baseline method remains a more precise approach to assessing concussion-related cognitive impairments.

KEYWORDS:

Assessment; Cognition; Concussion; Injury management; Neuropsychological evaluation; mTBI

PMID:
24813184
DOI:
10.1093/arclin/acu020
[Indexed for MEDLINE]

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