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Objective Describe who is able to return to driving (RTD) after moderate-to-severe traumatic brain injury (TBI), when this occurs, who maintains that activity, and the association with outcome. Design Cross-sectional descriptive study. Setting Eight follow-up sites of the TBI Model Systems (TBIMS) program. Participants 618 participants enrolled in the TBIMS and 88 caregivers (N=706). Interventions Not applicable. Main Outcome Measures A survey was completed from 1-30 years postinjury focusing on RTD. Descriptors included demographic information, injury severity, and current employment status. Outcome was assessed at the time of the interview, including depression, quality of life, functional status, and community participation. Results Of 706 respondents, 78% (N = 552) RTD, but 14% (N = 77) of these did not maintain that activity. Of those who RTD, 43% (N = 192) did so within 6 months of the injury and 92% did so within 24 months postinjury. The percentage of people driving after TBI did not differ significantly based on age at time of injury or follow-up. There were significant differences between drivers and nondrivers with respect to severity of injury, seizures, race, education, employment, rural vs urban setting, marital status, and family income. We performed a multivariate logistic regression to examine the association between driving status and demographic variables, adjusting for other variables in the model. The strongest associations were with current employment, family income, race, seizures, and severity of injury. Driving was associated with greater community participation, better functional outcomes, fewer symptoms of depression, and greater life satisfaction. Conclusions Over a span of 30 years, three-quarters of people experiencing moderate-to-severe TBI return to driving a personal vehicle, although not everyone maintains this activity. Employment, race, family income, and seizures are strongly associated with RTD.

Research Objectives To determine anxiety trajectories across the first 10 years after traumatic brain injury (TBI), and to identify predictors of the longitudinal course of anxiety. Design Longitudinal cohort study. Setting Community. Participants 2836 participants with moderate to severe TBI enrolled in the Traumatic Brain Injury Model Systems (TBIMS) National Database who had anxiety outcomes for ≥2 data collection points over a 10-year follow-up period. Interventions N/A. Main Outcome Measures Generalized Anxiety Disorder-7 (GAD-7) at 1, 2, 5, and 10-year follow-ups. Relationships were examined with demographic variables, indicators of TBI severity, number of TBIs in addition to the index TBI, pre-morbid mental health, and substance abuse history. Results A latent class mixed model identified three anxiety trajectories: low-stable (n=2195), increasing (n=289), and decreasing (n=352). Higher GAD-7 scores were significantly associated with Black race, having public insurance, premorbid mental health problems, experiencing ≥2 additional TBIs with loss of consciousness (LOC), and increased years post-TBI. An interaction between follow-up year and age was also related to GAD-7 scores (p=.001). Conclusions Most individuals in the sample had low anxiety that was stable over time (77%). Smaller percentages of individuals had higher levels of anxiety, that either increased (10%) or decreased (13%) as time progressed. Multiple TBI's with LOC were related to greater anxiety up to 10 years after injury. Systemic economic and racial inequities likely contribute to long-term anxiety, as evidenced by greater anxiety in those who had public insurance and/or identified as Black. Younger individuals were more likely to experience an increase in their anxiety over time, suggesting a need for long-term anxiety surveillance, particularly for patients whose TBI occurred at an earlier stage in life. Author(s) Disclosures None.

Hart T, Hoffman JM, Pretz C, Kennedy R, Clark AN, Brenner LA. A longitudinal study of major and minor depression following traumatic brain injury. Objective To examine patterns of change and factors associated with change in depression, both major (major depressive disorder [MDD]) and minor, between 1 and 2 years after traumatic brain injury (TBI). Design Observational prospective longitudinal study. Setting Inpatient rehabilitation centers, with 1- and 2-year follow-up conducted primarily by telephone. Participants Persons with TBI (N=1089) enrolled in the Traumatic Brain Injury Model Systems database, followed at 1 and 2 years postinjury. Interventions Not applicable. Main Outcome Measure Patient Health Questionnaire-9. Results Among participants not depressed at 1 year, close to three fourths remained so at 2-year follow-up. However, 26% developed MDD or minor depression between the first and second years postinjury. Over half of participants with MDD at year 1 also reported MDD the following year, with another 22% reporting minor depression; thus three fourths of those with MDD at year 1 experienced clinically significant symptoms at year 2. Almost one third of those with minor depression at year 1 traversed to MDD at year 2. Polytomous logistic regression confirmed that worse depression at year 1 was associated with higher odds of depression a year later. For those without depression at year 1, symptom worsening over time was related to year 2 problematic substance use and lower FIM motor and cognitive scores. For those with depression at year 1, worsening was associated with lower cognitive FIM, poor social support, and preinjury mental health issues including substance abuse. Conclusions Major and minor depression exist on a continuum along which individuals with TBI may traverse over time. Predictors of change differ according to symptom onset. Results highlight importance of long-term monitoring for depression, treating minor as well as major depression, and developing interventions for comorbid depression and substance abuse.

Objective To investigate recovery of medical decision-making capacity (MDC) over 6 months in persons with traumatic brain injury (TBI) stratified by injury severity. Design Longitudinal study comparing controls and patients with TBI 1 month after injury (t1) and 6 months after injury (t2). Setting Inpatient TBI rehabilitation unit and outpatient neurology department. Participants Participants (N=151) consisted of control subjects (n=60) and patients with TBI (n=91) stratified by injury severity: mild TBI (mTBI; n=27), complicated mild TBI (cmTBI; n=20), and moderate/severe TBI (msevTBI; n=44). Interventions Not applicable. Main Outcome Measures We used the Capacity to Consent to Treatment Instrument to evaluate MDC performance on 5 consent standards (expressing choice, reasonable choice, appreciation, reasoning, and understanding). We also assigned capacity impairment ratings on the consent standards to each participant with TBI using cut scores referenced to control performance. Results Control performance was stable across time on the consent standards. Patients with mTBI and cmTBI performed below controls on the understanding standard at t1 but not t2. Patients with msevTBI performed below controls on appreciation, reasoning, and understanding at t1, and on appreciation and understanding at t2, but showed substantial improvement over time. Conclusions Regardless of injury severity, all groups with TBI demonstrated baseline impairment of MDC with subsequent partial or full recovery of MDC over a 6-month period. However, a sizeable proportion of individual patients with TBI in each group continued to demonstrate capacity compromise at 6 months postinjury. Clinically, this finding suggests that individuals with TBI, regardless of injury severity, need continued monitoring regarding MDC for at least 6 months after injury.