Abstract Details Title Prevalence of Psychological Disorders among Patients with Mild vs Severe Traumatic Brain Injury: The Devil in the Details Topic Behavioral Neurology Presentation(s) P05 - (-) Poster/Presentation Number 117 Objective Background BACKGROUND: In the US alone, 1.5-2 million individuals suffer a traumatic brain injury (TBI) each year. Of those, an estimated 70 000-90 000 individuals experience substantial, long-term loss of physical and mental functioning. Design/Methods DESIGN/METHODS: We investigated 76 patients with mild TBI and 31 patients with severe TBI 30 days following injury for the presence of any behavioral or cognitive impairment. Neurobehavioral Rating Scale - Revised (NRS- R), which has an established specificity and validity to be used in TBI, was employed in the study. Results RESULTS: Out of a study sample of 31 patients with severe TBI, third reported symptoms of emotional withdrawal (depressive mood, anxiety, and emotional withdrawal) whereas only 2 % of patients with mild TBI reported such symptoms. Eight percent of patients with severe TBI had symptoms of heightened emotional state (irritability, hostility, and hyperactivity-agitation). Reduced arousal state symptoms (reduced alertness, inattention, and mental fatigability) were absent in patients with mild TBI, where 92% of patients with severe TBI were rated as mild to moderate on the scale of severity of symptoms. Conclusions CONCLUSIONS: Psychiatric complications following TBI are common complications in both patients with mild TBI and severe TBI. Therefore, patients with mild TBI should be evaluated for signs and symptoms of any change in mood or behavior. Authors/Disclosures Awad A. Al Harbi, MD PRESENTER No disclosure on file No disclosure on file