Social support is one of the most robust predictors of posttraumatic stress disorder (PTSD). Yet, little is known about factors that moderate the relationship between social support and PTSD symptom severity. This meta-analysis estimated the overall effect size of the relationship between self-reported social support and PTSD severity and tested meaningful demographic, social support, and trauma characteristics that may moderate this association using both crosssectional and longitudinal effect sizes. A comprehensive search identified 139 studies with 145 independent cross-sectional effect sizes representing 62,803 individuals and 37 studies with 38 independent longitudinal effect sizes representing 25,792 individuals. Study samples had to comprise trauma-exposed, nonclinical adult populations to be included in the analysis. Crosssectional and longitudinal analyses revealed a near medium overall effect size (rcross = -.27; 95% CI [-.30, -.24]; rlong = -.25; 95% CI [-28, -.21]) with a high degree of heterogeneity (crosssectional I 2 = 91.6, longitudinal I 2 = 86.5). Both cross-sectional and longitudinal moderator analyses revealed that study samples exposed to natural disasters had a weaker effect size than samples exposed to other trauma types (e.g., combat, interpersonal violence), studies measuring negative social reactions had a larger effect size than studies assessing other types of social support, and veteran samples revealed larger effect sizes than civilian samples. Several other methodological and substantive moderators emerged that revealed a complex relationship between social support and PTSD severity. These findings have important clinical implications for the types of social support interventions that could mitigate PTSD severity. Public Significance StatementThis meta-analysis indicates that social support buffers against posttraumatic stress disorder (PTSD) symptoms among trauma-exposed individuals. The effect was weaker among individuals exposed to a natural disaster and stronger among veterans. The effect was also stronger when examining negative social reactions in response to trauma.Posttraumatic stress disorder (PTSD) is a debilitating condition that is associated with significant chronic impairment (

Intimate partner violence (IPV) is a serious, devastating, and prevalent problem. IPV places women at risk for negative health consequences, including increased mental health disorders. The majority of research to date has focused on mental health disorders among women in domestic violence shelters, and research is needed that examines mental health disorders among a broader range of women experiencing IPV. Therefore, the present study examined the prevalence of posttraumatic stress disorder (PTSD), depression, and substance abuse disorders in a community sample of IPV victims (N = 94) using diagnostic interviews. Results showed that the majority of women met diagnostic criteria for a mental health disorder, with PTSD being the most common mental health disorder. Furthermore, psychological abuse was a significant predictor of both PTSD and depression, whereas physical aggression did not predict these outcomes. Implications of these findings for treatment and intervention work with battered women are discussed.

Despite the availability of specialty posttraumatic stress disorder (PTSD) care within Department of Veterans Affairs (VA) facilities, many VA patients with PTSD do not seek needed PTSD treatment. This study examined institutional and stigma-related barriers to care among a large diverse group of Vietnam and Iraq/Afghanistan veterans who had been diagnosed with PTSD by a VA provider. A total of 490 patients who had not received VA treatment for PTSD in the previous 2 years (31% response rate) were asked about psychological symptoms and reasons for not using care. Stigma related barriers (concerns about social consequences and discomfort with help-seeking) were rated as more salient (rated in the "slightly" to "moderately" problematic range) than institutional factors (not "fitting into" VA care, staff skill and sensitivity, and logistic barriers; rated in the "not at all" to "slightly" problematic range). Regression analyses revealed that younger age and White females were associated with higher ratings on not fitting into VA health care, whereas non-White males were associated with higher ratings on logistic barriers. PTSD symptoms were positively associated with perceived barriers to care, with the most consistent results observed for PTSD avoidance symptoms. Magnitude of effects was generally small, suggesting the possibility that other factors not assessed in this study may also contribute to perceptions of barriers to care. Future research should attend to the effects of stigma, as well as institutional barriers to care, on VA mental health treatment seeking.

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