B – 39 Identifying Memory Impairment in Current and Former Military Special Operators

Abstract Objective United States military special operators are exposed to training and missions in extreme conditions that can lead to injuries and health problems affecting their physical, psychological, and cognitive functioning. We applied new algorithms for identifying memory impairment in military special operators undergoing neuropsychological evaluations. Method Data from 900 individuals ages 69 and younger comprising the Wechsler Memory Scale-Fourth Edition standardization sample were used to develop algorithms. Memory tests included the immediate and delayed subtests for Logical Memory, Verbal Paired Associates, and Visual Reproduction. New algorithms for defining memory impairment were applied to 81 current and former military special operators undergoing a clinical neuropsychological evaluation. Results Most special operators (77.8%) reported having significant memory problems over the past year. Mann-Whitney U tests revealed no significant differences in memory test scores between special operators who reported memory problems versus those who did not. Having three or more memory scores ≤16th percentile (scaled score [SS]≤7) occurred in 19.9% of the WMS-IV normative sample and 1.2% of the military special operators. Having three or more memory scores ≤9th percentile (SS≤6) occurred in 9.6% of the WMS-IV normative sample and having three or more memory scores ≤5th percentile (SS≤5) occurred in 5.0% of the normative sample. None of the military special operators met either of the latter criteria for memory impairment. Conclusion Perceived memory problems were prevalent, but objectively measured memory impairment was rare in military special operators undergoing neuropsychological evaluations. Focusing on modifiable factors in treatment and rehabilitation may enhance cognitive functioning and overall quality of life.