Multivariate Patterns of Substance Use, Minority Stress and Environmental Violence Associated with Sexual Revictimization of Lesbian and Bisexual Emerging Adult Women.

This study documented between-group differences in factors associated with sexual revictimization histories in a sample of young sexual minority women. Diverse samples of lesbian (N = 204, ageM = 23.55 years) and bisexual (N = 249, ageM = 23.35 years) women from the United States were recruited using the CloudResearch platform to assess factors associated with recent experiences of intimate partner violence (IPV). Participants were categorized into four groups based on self-reports of sexual victimization (a) during childhood and (b) during adulthood in intimate relationships. Multivariate Analysis of Variance (MANOVA) was used to model between-group differences in three variable domains: Past-year substance use involvement, minority stress, and violence in relationship and community settings. Lesbian women reporting sexual revictimization in adulthood reported significantly higher scores for measures of past-year substance use involvement and negative consequences, daily discrimination experiences, relational victimization, and criminal victimization, compared to their counterparts with no history of sexual victimization. Among bisexual women, sexual revictimization was associated with a similar pattern of between-group differences. The sexual revictimization experiences of sexual minority women appear to occur in the context of multivariate patterns of harmful substance use, minority stress, and violence in both relationship and community settings. Our findings have implications for how intervention services are provided to emerging adult sexual minority women who experience multiple episodes of sexual abuse during their lifespans. Recommendations include specialized training for counseling or intervention service providers, integrated trauma-informed services that address both substance use and sexual assault issues, and affirmative services for sexual minority women.

Factors Associated with Sexual Victimization Among Transgender Emerging Adults.

This cross-sectional study documented between-group differences in risk factors associated with sexual victimization histories in an ethnically and racially diverse sample of transgender emerging adults (N = 248, ageM = 22.61 years). The sample was recruited using the Internet-based CloudResearch platform to answer questionnaires assessing predictors for recent experiences of intimate partner violence (IPV). Participants were categorized into four groups based on cross-classified self-reports of child sexual abuse (CSA) and recent sexual IPV, prior to the use of multivariate analysis of variance to evaluate mean score differences for past-year substance use, minority stressor, and relationship functioning variables. Participants reporting sexual IPV reported higher scores for all substance use variables, while transfeminine participants reported significantly higher scores for alcohol use problems and negative consequences related to substance use. Participants reporting both CSA and sexual IPV also reported the highest scores for everyday discrimination. Participants who experienced sexual IPV also reported the highest scores for internalized sexual stigma. Sexual revictimization among transgender adults occurs in the context of harmful patterns of substance use and several minority stressors. Our findings have implications for healthcare or counseling services for transgender emerging adults who have experienced multiple forms of victimization, substance use problems, and minority stressors, including the importance of trauma-informed and integrated intervention services, and specialized training for service providers.

Edema progression in proximity to traumatic microbleeds: evolution of cytotoxic and vasogenic edema on serial MRI.

Introduction: Although cerebral edema is common following traumatic brain injury (TBI), its formation and progression are poorly understood. This is especially true for the mild TBI population, who rarely undergo magnetic resonance imaging (MRI) studies, which can pick up subtle structural details not visualized on computed tomography, in the first few days after injury. This study aimed to visually classify and quantitatively measure edema progression in relation to traumatic microbleeds (TMBs) in a cohort of primarily mild TBI patients up to 30 days after injury. Researchers hypothesized that hypointense lesions on Apparent Diffusion Coefficient (ADC) detected acutely after injury would evolve into hyperintense Fluid Attenuated Inversion Recover (FLAIR) lesions. Methods: This study analyzed the progression of cerebral edema after acute injury using multimodal MRI to classify TMBs as potential edema-related biomarkers. ADC and FLAIR MRI were utilized for edema classification at three different timepoints: ≤48 hours, ~1 week, and 30 days after injury. Hypointense lesions on ADC (ADC+) suggested the presence of cytotoxic edema while hyperintense lesions on FLAIR (FLAIR+) suggested vasogenic edema. Signal intensity Ratio (SIR) calculations were made using ADC and FLAIR to quantitatively confirm edema progression. Results: Our results indicated the presence of ADC+ lesions ≤48 hours and ~1 week were associated with FLAIR+ lesions at ~1 week and 30 days, respectively, suggesting some progression of cytotoxic edema to vasogenic edema over time. Ten out of 15 FLAIR+ lesions at 30 days (67%) were ADC+ ≤48 hours. However, ADC+ lesions ≤48 hours were not associated with FLAIR+ lesions at 30 days; 10 out of 25 (40%) ADC+ lesions ≤48 hours were FLAIR+ at 30 days, which could indicate that some lesions resolved or were not visualized due to associated atrophy or tissue necrosis. Quantitative analysis confirmed the visual progression of some TMB lesions from ADC+ to FLAIR+. FLAIR SIRs at ~1 week were significantly higher when lesions were ADC+ ≤48 hours (1.22 [1.08-1.32] vs 1.03 [0.97-1.11], p=0.002). Conclusion: Awareness of how cerebral edema can evolve in proximity to TMBs acutely after injury may facilitate identification and monitoring of patients with traumatic cerebrovascular injury and assist in development of novel therapeutic strategies.