The TBI Model Systems Neighborhood Socioeconomic Disadvantage Index (TBIMS-NSDI): Development and Comparison to Individual Socioeconomic Characteristics.

OBJECTIVE: To create a census-based composite neighborhood socioeconomic deprivation index (NSDI) from geocoded residential addresses and to quantify how NSDI aligns with individual-level socioeconomic factors among people with traumatic brain injury (TBI). SETTING: Community. PARTICIPANTS: People enrolled in the TBI Model Systems National Database (TBIMS NDB). DESIGN: Secondary analysis of a longitudinal cohort study. MAIN MEASURES: The TBIMS-NSDI was calculated at the census tract level for the United States population based on a principal components analysis of eight census tract-level variables from the American Community Survey. Individual socioeconomic characteristics from the TBIMS NDB were personal household income, education (years), and unemployment status. Neighborhood:Individual NSDI residuals represent the difference between predicted neighborhood disadvantage based on individual socioeconomic characteristics versus observed neighborhood disadvantage based on the TBIMS-NSDI. RESULTS: A single principal component was found to encompass the eight socioeconomic neighborhood-level variables. It was normally distributed across follow-up years 2, 5, and 10 post-injury in the TBIMS NDB. In all years, the TBIMS-NDSI was significantly associated with individual-level measures of household income and education but not unemployment status. Males, persons of Black and Hispanic background, Medicaid recipients, persons with TBI caused by violence, and those living in urban areas, as well as in the Northeast or Southern regions of the United States, were more likely to have greater neighborhood disadvantage than predicted based on their individual socioeconomic characteristics. CONCLUSIONS: The TBIMS-NSDI provides a neighborhood-level indicator of socioeconomic disadvantage, an important social determinant of outcomes from TBI. The Neighborhood:Individual NSDI residual adds another dimension to the TBIMS-NSDI by summarizing how a person's socioeconomic status aligns with their neighborhood socioeconomics. Future studies should evaluate how both measures affect TBI recovery and life quality. Research studying neighborhood socioeconomic disadvantage may improve our understanding of how systemic adversity influences outcomes after TBI.

Patient Factors Associated With Prolonged Length of Stay After Traumatic Brain Injury.

Background For traumatic brain injury (TBI) survivors, recovery can lead to significant time spent in the inpatient/rehabilitation settings. Hospital length of stay (LOS) after TBI is a crucial metric of resource utilization and treatment costs. Risk factors for prolonged LOS (PLOS) after TBI require further characterization. Methodology We conducted a retrospective analysis of patients with diagnosed TBI at an urban trauma center. PLOS was defined as the 95th percentile of the LOS of the cohort. Patients with and without PLOS were compared using clinical/injury factors. Analyses included descriptive statistics, non-parametric analyses, and multivariable logistic regression for PLOS status. Results The threshold for PLOS was >24 days. In the cohort of 1,343 patients, 77 had PLOS. PLOS was significantly associated with longer mean intensive care unit (ICU) stays (16.4 vs. 1.5 days), higher mean injury severity scores (18.6 vs. 13.8), lower mean Glasgow coma scale scores (11.3 vs. 13.7) and greater mean complication burden (0.7 vs. 0.1). PLOS patients were more likely to have moderate/severe TBI, Medicaid insurance, and were less likely to be discharged home. In the regression model, PLOS was associated with ICU stay, inpatient disposition, ventilator use, unplanned intubation, and inpatient alcohol withdrawal. Conclusions TBI patients with PLOS were more likely to have severe injuries, in-hospital complications, and Medicaid insurance. PLOS was predicted by ICU stay, intubation, alcohol withdrawal, and disposition to inpatient/post-acute care facilities. Efforts to reduce in-hospital complications and expedite discharge may reduce LOS and accompanying costs. Further validation of these results is needed from larger multicenter studies.

Association Between Social Determinants of Health and Traumatic Brain Injury: A Scoping Review.

Traumatic brain injury (TBI) is a leading cause of death and disability worldwide. Disparities exist in the populations that acquire TBIs, however, with a greater burden and poorer outcomes associated with communities of color and lower socioeconomic status. To combat health inequities such as these, institutions have begun to target social determinants of health (SDoH), which are environmental factors that affect health outcomes and risks. The SDoH may play a role in sustaining a TBI and provide modifiable targets for action to reduce the risk of TBI, especially in high-risk communities. In this study, we describe the existing literature regarding SDoH and their association with sustaining a TBI. We performed a scoping review with a comprehensive search of the Ovid MEDLINE/Embase databases. To summarize the literature, this review adapts the World Health Organization's Commission on SDoH's conceptual framework. Fifty-nine full-text articles, including five focusing on lower and middle-income countries, met our study criteria. Results of the scoping review indicate that several structural determinants of health were associated with TBI risk. Lower educational attainment and income levels were associated with higher odds of TBI. In addition, multiple studies highlight that minority populations were identified as having higher odds of TBI than their White counterparts. Literature highlighting intermediate determinants of health examined in this review describes associations between sustaining a TBI and rurality, work environment, medical conditions, medication/substance use, and adversity. Recommended exploration into lesser-researched SDoH is discussed, and the expansion of this review to other aspects of the TBI continuum is warranted.

Impact of a focused trauma course on retention of provider skills, knowledge and confidence at a regional hospital in the Dominican Republic.

INTRODUCTION: Road traffic accidents are a public health epidemic, causing significant morbidity and mortality in low- and middle-income countries. The Dominican Republic (DR) ranks among the highest road traffic fatality rates in the world. There is no formalized trauma curriculum in the DR. A short trauma course was implemented at a San Pedro de Macoris, DR hospital with pre-, post- and retention evaluation of the knowledge, skills and confidence of the providers. METHODS: A 4-day trauma course was developed for medical students and residents. On days 1 and 4, providers completed pre- and post-training assessments consisting of a 40-question written exam, 1 simulation case and a trauma confidence questionnaire. Simulation cases were evaluated using a critical actions checklist and a non-technical skills scale (TNOTECHS). Assessments were repeated in 2 months to evaluate for knowledge, skill and confidence retention. A repeated measures ANOVA model was used to evaluate pre-, post- and retention training differences in the written exam, non-technical skills and critical actions scores. Confidence scores were assessed using a cumulative logistic regression model. RESULTS: A total of 65 people participated (36 medical students, 22 EM and 7 family medicine residents). Of the 65 participants, 39, 22 and 21 participants had complete scores for pre-post, pre-retention and post-retention comparisons respectively. Mean test scores for the written exam were 37.2, 63.5 and 52.2 for pre, post and retention results respectively. Comparisons between pre and post as well as pre and retention showed statistically significant differences (p=0.0001). Mean TNOTECHS total scores were 15.8, 21.3 and 20.8 for pre-, post- and retention results respectively with a significant difference found between pre- and post- training and pre- and retention training (p <0.05). Simulation mean checklist scores were 57.7%, 67.8% and 74.1% for pre-, post- and retention training respectively with a significant difference established between pre- and retention scores (p<0.05). Provider opinion that their ED patients received best care possible and patients' needs were identified and addressed showed statistically significant increases. CONCLUSION: A short trauma course can improve trauma specific knowledge, skills and confidence with significant retention at two months. A longitudinal trauma curriculum may bolster retention.

Role of nuclear factor kappaB in ovarian hormone-mediated stress hypersensitivity in female mice.

BACKGROUND: The molecular mechanisms of stress-induced depressive behaviors have been characterized extensively in male rodents; however, much less is known about female subjects, despite the fact that human depression is far more prevalent in women. METHODS: To gain insight into these mechanisms, we performed microarray analysis in nucleus accumbens (NAc), a key brain reward region implicated in depression, in ovariectomized (OVX) and gonadally intact female mice after chronic unpredictable stress and measured stress-induced depression-like behavior in the forced swim test (FST). Male mice were studied in the FST for comparison. RESULTS: We find that stress regulation of genes in NAc of gonadally intact female mice is blunted in OVX mice. This pattern of gene regulation is consistent with behavioral findings on the FST: the pro-depression-like effect of stress in intact female mice is absent in OVX female and gonadally intact male mice. We identified, among many genes regulated by stress, several nuclear factor kappaB (NFkappaB) subunits-a pro-survival transcription factor involved in cellular responses to stress-as being highly upregulated in NAc of OVX mice. Given the role of NFkappaB during stress, we hypothesized that upregulation of NFkappaB by OVX decreases susceptibility to stress. Indeed, we show that inhibition of NFkappaB in NAc of OVX animals increases susceptibility to stress-induced depressive behaviors, whereas activation of NFkappaB in NAc of intact female subjects blocks susceptibility. CONCLUSIONS: These results suggest a hormonal mechanism of NFkappaB regulation that contributes to stress-induced depressive behaviors in female subjects and might represent a mechanism for gender differences in prevalence rates of these disorders in humans.