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ABSTRACT
Traumatic brain injury (TBI) results in heterogeneous patterns of neuropsychological impairment. This study investigated heterogeneity in executive function (EF) using the Comprehensive Trail Making Test (CTMT) to evaluate 121 children and adolescents with TBI and 121 matched normal controls. The TBI group performed approximately two standard deviations below controls. Cluster analyses indicated that a three-cluster solution best classified the TBI group and a four-cluster solution best classified controls. Greater impairment in EF was associated with lower intellectual, achievement, and neuropsychological test performance in the TBI group. Results suggest that EF deficits reflected in CTMT performance may be useful for classifying severity of TBI.
Acknowledgments
Normal comparison (NC) data was from Comprehensive Trail Making Test standardization sample. Copyright © 2002 by PAR Inc., San Antonio, TX. Used with permission. All rights reserved. We thank the Comprehensive Trail Making Test publisher for allowing access to the standardization data. The authors of this paper declare that there were no conflicts of interest in conducting and reporting this research.