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Background and Objectives: High rates of comorbidity between anxiety disorders and bipolar disorder (BD) have been reported. Studies on the impact of BD comorbidity in individuals with a principal anxiety disorder have been limited.
Methods: Individuals (N = 186) seeking anxiety disorder treatment completed questionnaires and a diagnostic interview. Anxious individuals with comorbid BD were compared to anxious individuals with comorbid depression, and individuals with an anxiety disorder only.
Results: Anxious individuals with BD were more likely to report being single, separated or divorced, and to present with greater substance abuse and comorbidity than individuals with an anxiety disorder only. Anxious individuals with BD also presented with lower household income than anxious individuals with depression, and individuals with anxiety only. Anxious individuals with either comorbid BD or comorbid depression reported greater functional impairment and more severe symptoms than individuals with anxiety only.
Conclusions: Overall, the presence of comorbid BD was associated with demographic and clinical factors that have been previously shown to adversely affect treatment outcome in people with anxiety disorders.
