High levels of diagnostic comorbidity and symptom co-occurrence suggest that these symptoms may share common correlates. Identifying shared and non-shared correlates of these symptoms will help us to further our understanding of how and where symptoms of anxiety and depression converge and diverge. Identification of trans-diagnostic and specific correlates of symptoms of anxiety and depression could be important in understanding the development of symptoms and helpful in refining targets for intervention. Research has begun to identify correlates that may be transdiagnostic to both anxiety and depressive symptoms, with many studies focusing on cognitive vulnerabilities as correlates of these symptoms in adolescent and adult populations (e.g., Bird et al. 2013; D’Avanzato et al. 2013; Epkins et al. 2013; McLaughlin and Nolen-Hoeksema 2011).
