What can interfere with treatment for OCD?

Edna Foa (1979) found that clients with "overvalued ideation" (fixed beliefs) did not benefit from Exposure and Response Prevention.  In other words, their mistaken beliefs about the dangerousness of obsessional situations interfered with habituation of fears.  Clients with panic disorder may need to be treated for panic prior to undergoing treatment for OCD, or it can be treated concurrently.  If OCD sufferers have obsessional traits in which they take pride, they may find it difficult to undergo treatment for OCD if the OCD is in some way connected to the traits.  Compulsive personality traits might need to be treated prior to treating OCD.