ANAM4 TBI Reaction Time-Based Tests have Prognostic Utility for Acute Concussion
NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
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The Concussion Restoration Care Center has used the Automated Neuropsychological Assessment Metrics version 4 Traumatic Brain Injury ANAM4 TBI battery in clinical assessment of concussion. The studys aim is to evaluate the prognostic utility of the ANAM4 TBI. In 165 concussed active-duty personnel all ultimately returned to duty seen and tested on the ANAM4 TBI on days 3 and 5 from their injury, Spearmans rho statistics showed that all performance subtests at day 5 were associated with fewer days return to duty RTD, while concussion history or age did not. Kruskal- Wallis statistics showed that ANAM4 TBI and loss of consciousness were associated with increased RTD time ANAM4 TBI reaction time-based subtests, collectively, showed a larger effect size. A survival analysis using a Kaplan-Meier plot showed that the lowest 25 on the reaction time-based subtests had a median RTD time of 19 days, while those in the upper 25 had a median RTD time of approximately 7 days. Results indicate that until validated neurocognitive testing is introduced, the ANAM4 TBI, especially reaction time based tests, has prognostic utility.
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