The National Comorbidity Survey (NCS) determined that the comorbidity rate of posttraumatic stress disorder (PTSD) with panic disorder is 7.3% for males and 12.6% for females. A 21-year-old female\u27s presenting symptoms corresponded to this dual diagnosis, with the addition of comorbid major depressive disorder. The Personality Assessment Inventory (PAI) was used as part of an initial comprehensive assessment battery. Treatment was provided over a period of 6 months, and multiple channel exposure therapy (MCET) was chosen as the primary treatment, as it has been shown to be a promising treatment for the comorbid presentation of PTSD with panic disorder. Upon completion of the MCET, the PAI was readministered as a posttreatment evaluation. The posttreatment PAI results indicated clinical improvement across all indices that initially suggested clinical problems. Results of this case study suggest that the PAI is sensitive to treatment gains from the MCET for the comorbid conditions of PTSD, panic disorder, and major depressive disorder
