OBJECTIVE: The authors sought to determine the frequency of DSM-III
personality disorders in subjects with obsessive-compulsive disorder, well
comparison subjects, and their first-degree relatives. METHOD: Thirty-two
subjects with obsessive-compulsive disorder and 33 age- (within 5 years)
and gender-matched well comparison subjects were assessed with the
Structured Interview for DSM-III Personality Disorder and several
self-report instruments. Their first-degree relatives were assessed in a
blind manner with the same instruments. RESULTS: Subjects with
obsessive-compulsive disorder were more likely than well comparison
subjects to have a personality disorder, but compulsive personality was not
the most frequent. No significant differences were found in the prevalence
of personality disorders among first-degree relatives, including compulsive
personality, or in obsessional, hysterical, or oral character traits.
CONCLUSIONS: Personality disorders are highly prevalent among patients with
obsessive-compulsive disorder, but the data do not support a relationship
between obsessive- compulsive disorder and compulsive personality.