The cognitive model posits that negative appraisals play an important role in posttraumatic stress disorder, in children as well as in adults. This study examined correlates of negative appraisals in relation to trauma exposure and their relationship to posttraumatic stress symptoms (PTSS) in 414 Sri Lankan adolescents, aged 12 to 16, living in areas impacted in varying degrees by the 2004 tsunami. In 2008, participants completed measures of negative appraisals, lifetime traumatic events, posttraumatic stress symptoms, internalizing symptoms, ongoing adversity, and social support. The majority (70 %) of the participants reported multiple traumatic events; 25 % met DSM-IV criteria for full or partial PTSD. Adolescents who had experienced more severe events, abusive events, greater cumulative trauma, or greater current adversity reported more negative appraisals. In regression analyses controlling for known risk factors such as female gender, cumulative trauma, ongoing adversity, and low social support, negative appraisals were the best predictor of PTSS, explaining 22 % of the variance. This relationship appeared specific to PTSS, as negative appraisals did not predict internalizing symptoms. Findings confirm the link between negative cognitions concerning traumatic events and persistent PTSS in adolescents, but longitudinal studies are needed to determine whether appraisals contribute to symptom maintenance over time.

Prior trauma, current stress, and poor social support contribute to youth mental health problems. As daily stressors often increase in the aftermath of traumatic events, trauma could plausibly impact psychopathology not only directly but also indirectly via ongoing stress. In this study, we examined the relative roles of trauma and daily stressors in mental health outcomes in 753 Sri Lankan adolescents residing in areas impacted by the 2004 tsunami. In 2008, participants completed measures of trauma exposure, daily stressors, social support, posttraumatic stress symptoms (PTSS), emotional and behavioral problems (EBP), and functional impairment; a subsample (n = 89) repeated these assessments 16 months later. Regression models revealed positive associations between cumulative trauma and all three mental health measures. Significant variance in these associations could be explained indirectly, via daily stressors. For PTSS, the indirect effect accounted for 26.1% of the total effect of trauma, unstandardized coefficient ab = 0. 739, 95% CI [0.459, 1.122]. For EBP this percentage was 42.4%, ab = 0.287, 95% CI [0.189, 0. 404], and for functional impairment 70.0%, ab = 0.072, 95% CI [0.049, 0.121]. Indirect effects on impairment were strongest when perceived social support was low. Although we also present evidence that pathways between stressors and psychopathology may have been bidirectional, findings support the notion that adolescents' daily stressors are important transmitters of the impact of traumatic events and highlight the need for interventions focused not only on trauma processing but also on reducing current stress and improving social support.

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