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  • Title: Patterns of covariation of DSM-IV personality disorders in a mixed psychiatric sample.
    Author: Fossati A, Maffei C, Bagnato M, Battaglia M, Donati D, Donini M, Fiorilli M, Novella L, Prolo F.
    Journal: Compr Psychiatry; 2000; 41(3):206-15. PubMed ID: 10834630.
    Abstract:
    The covariation patterns of DSM-IV personality disorders (PDs) were studied in 431 consecutively admitted psychiatric patients. The co-occurrence rate was greater than 50% for all DSM-IV PDs. Both bivariate association tests and loglinear models showed distinct significant covariation patterns among PDs which were stable across confounder strata. DSM-IV PD clusters were not replicated, with the exception of cluster A. Principal-component analysis (PCA) showed the presence of 3 latent dimensions, thus explaining the DSM-IV PD covariation patterns. These results seem to stress the inadequacy of the DSM-IV categorical model of PD assessment. The need for a reduction of axis II categories and the inclusion of a dimensional model in the diagnostic assessment of DSM-IV PDs are discussed.
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