Violence Prevention: Reducing Psychological Harm from Traumatic Events

Research Gaps

Prior to and during the literature review and data analysis, the review team and the Community Preventive Services Task Force attempt to address the key questions of what interventions work, for whom, under what conditions, and at what cost. Lack of sufficient information often leaves one or more of these questions unanswered. The Community Guide refers to these as "research gaps." Research gaps can be pulled together in the form of a basic set of questions to inform a research agenda for those in the field or can be a more extensive narrative that weaves mention of gaps into a discussion generated by findings from the review.

Identified Research Gaps

• Identification of robust predictors of transient and enduring symptoms following traumatic events would allow for better screening of exposed children and adolescents and more efficient allocation of treatment resources.
• The optimal timing of cognitive behavioral therapy (CBT) intervention following the exposure and the onset of symptoms is important to assess.
• It would be useful to stratify the outcomes of CBT treatment by the severity of patient PTSD symptoms and history. For example, it would be useful to know whether children and adolescents with multiple traumatic exposures require more intensive or longer treatment.
• One study with long term follow-up indicates that it may take a year after the end of the intervention for benefits to appear. This outcome should be replicated. If confirmed, it suggests that follow-up periods of less than one year are not adequate and may erroneously indicate intervention ineffectiveness.
• The cost effectiveness and differential cost effectiveness of individual and group CBT among children and adolescents should be explored.
• The effectiveness of individual and group CBT among minority populations, especially in communities in which violence is prevalent, should be further explored.
• Adaptations of CBT involving the recruitment, training, deployment, and supervision of nonprofessionals should be evaluated, and their applicability to low-income countries should also be explored.

Furthermore, the finding of insufficient evidence to determine the effectiveness of several of the interventions reviewed highlights the need for additional well-controlled studies of these interventions. Because CBT has been found to be an effective intervention, and because research funds are limited, it would be useful to adopt CBT as a comparison in future evaluations. Because of harms reported for psychological debriefing among adults, caution should be taken in research on this intervention with children and adolescents.

Evidence Review

W Wethington H, Hahn R, Fuqua-Whitley D et al. The effectiveness of interventions to reduce psychological harm from traumatic events among children and adolescents: a systematic review. Am J Prev Med 2008;35(3):287-313.