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Frequency of personality disorders in two age cohorts of psychiatric inpatients
C M Grilo1, T H McGlashan, D M Quinlan
1Yale Psychiatric Institute, New Haven, CT 06520, USA.
Objective:
The authors examined the frequency of DSM-III-R personality disorders in adolescent and young adult psychiatric inpatients.
Method:
Structured diagnostic interviews were reliably performed with a series of 255 consecutively admitted inpatients (138 adolescents and 117 young adults).
Results:
Most personality disorders were diagnosed in similar frequencies in the two study groups. Passive-aggressive personality disorder was diagnosed with lower frequency and dependent personality disorder with higher frequency in the young adult than in the adolescent group.
Conclusions:
The isomorphism of relative frequencies among psychiatric inpatients suggests that what is seen in adolescents are valid forms of most adult personality disorders.