Background: The likelihood of developing Posttraumatic Stress Disorder (PTSD) depends on the interaction of individual risk factors and cumulative traumatic experiences. Hence, the identification of individual susceptibility factors warrants precise quantification of trauma exposure. Previous research indicated that some traumatic events may have more severe influences on mental health than others; thus, the assessment of traumatic load may be improved by weighting event list items rather than calculating the simple sum score.Objective: We compared two statistical methods, Random Forests using Conditional Interference (RF-CI) and Least Absolute Shrinkage and Selection Operator (LASSO), based on their ability to rank traumatic experiences according to their importance for predicting lifetime PTSD.Methods: Statistical models were initially fitted in a sample of N1 = 441 survivors of the Northern Ugandan rebel war. The ability to correctly predict lifetime PTSD was then tested in an independent sample of N2 = 211, and subsequently compared with predictions by the simple sum score of different traumatic event types experienced.Results: Results indicate that RF-CI and LASSO allow for a ranking of traumatic events according to their predictive importance for lifetime PTSD. Moreover, RF-CI showed slightly better prediction accuracy than the simple sum score, followed by LASSO when comparing prediction results in the validation sample.Conclusion: Given the expense in time and calculation effort by RF-CI and LASSO, and the relatively low increase in prediction accuracy by RF-CI, we recommend using the simple sum score to measure the environmental factor traumatic load, e.g., in analyses of gene × environment interactions.
BackgroundThe U.S. Department of Veterans Affairs (VA) has recently implemented a comprehensive national program to help veterans who use or experience intimate partner violence (IPV). One important component of this plan is to implement Strength at Home (SAH), a 12-week cognitive-behavioral and trauma-informed group treatment designed to reduce and end IPV use among military and veteran populations.MethodThe present study describes initial patient and clinician findings from the first year of a training program tasked with implementing SAH at 10 VA medical centers.ResultsResults from 51 veterans who completed both pre- and post-treatment assessments indicate SAH was associated with significant pre- to post-treatment reductions in the proportion of veterans who reported using physical and psychological IPV toward a partner, the types of IPV used, and posttraumatic stress disorder symptoms. Overall, veterans reported high satisfaction with the quality and nature of services received, and with the program materials. In addition, 70% of sites and 34% of the 79 clinicians trained were successful in launching the program in the first year. The mean number of days between site training and initiation of the first group session was 135.86 (SD = 63.16, range 72–252).ConclusionsResults suggest that the training and implementation program was successful overall. However, average length of time between in-person training and initiation of group services was longer than desired and there were three sites that did not successfully implement the program within the first year, suggesting a need to reduce implementation barriers and enhance institutional support.
The field of clinical psychological science exists within a broader field of psychology, which is increasingly acknowledged as embedded in racist and white supremacist history. In the production of clinical psychological science, the Clinical Science Model predominates as one of the most influential scientific voices that emphasizes the value of rigorous scientific theory, training, and praxis. We highlight some of the ways in which the Clinical Science Model has neglected antiracism. By examining the idiosyncratic development of the Clinical Science Model within clinical psychological science, we outline how its failure to contend with systemic racism within the field propagates a racist subdiscipline. Our hope is that by enacting difficult self-reflection, we invite other stakeholders within our field to think more critically about how systemic racism and white supremacy pervade our structures and institutions, and to begin making more concrete changes that move the clinical psychological science field toward explicit antiracism.
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