This review article addresses the frequently noted comorbidity between obsessive-compulsive disorder (OCD) and obsessive-compulsive personality disorder (OCPD). We begin by reviewing the recent empirical literature on the co-occurrence of these two conditions and the functional consequences of comorbid OCPD on OCD. We describe theoretical conceptualizations of the links between these disorders, including shared mechanisms that may drive the association between these two distinct conditions. We then provide an overview of diagnostic measures for OCPD and differential diagnosis. We also review data on the impact of comorbid OCPD on cognitive-behavioral treatment for OCD, including how to address potential treatment barriers through which OCPD may complicate OCD treatment. Lastly, we conclude with directions for future research.
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