Current Issues in Anxiety and Depression: Comorbid, Mixed, and Subthreshold Disorders.

Recent attention has been given to the high frequency of coexisting anxiety and depressive symptoms that has served to challenge the more traditional view that these two disorders are typically discrete syndromes. Furthermore, research suggests that less severe states of anxiety and depression continue to be overlooked, despite their capacity to produce significant psychosocial impairment. Given the implications for diagnostic and treatment outcome, psychologists need to be aware of the epidemiology, clinical presentations, and treatment strategies surrounding comorbid and subthreshold anxiety and depression. We review the literature, present issues related to these syndromes, and discuss the implications for diagnostic and clinical activities.