Factor structure of DSM-III-R personality disorders shown by self-report questionnaire: implications for classifying and assessing personality disorders

Authors

  • J. H. Dowson,

    1. Department of Psychiatry, Cambridge University, Addenbrooke's Hospital, Cambridge, United Kingdom
    2. J.H. Dowson, Cambridge University Department of Psychiatry, Level E4, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 2QQ, UK
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  • G. E. Berrios

    1. Department of Psychiatry, Cambridge University, Addenbrooke's Hospital, Cambridge, United Kingdom
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Abstract

A modified version of the revised Personality Diagnostic Questionnaire (PDQ-R), based on DSM-III-R personality disorders (PD), was completed by 74 psychiatric patients. A factor analysis of the scores for each of the PD (i.e. of the number of positive DSM-III-R criteria for each of the PD) yielded 3 factors that defined 3 PD clusters. These were similar to the 3 DSM-III-R PD clusters for 7 of the 11 PD categories. The 3-group solution of a cluster analysis of the patients (using their scores of positive criteria for each of the PD) did not reflect these factors; the main discriminating variable between the 3 groups of patients was the total number of positive PD criteria. It is suggested that, for the routine assessment of patients, the most important derivative of the DSM-III-R classification of PD is the total score of positive PD criteria.

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