Journal Article

Latent Class Analysis of <i>DSM-IV</i> Schizotypal Personality Disorder Criteria in Psychiatric Patients

Andrea Fossati, Cesare Maffei, Marco Battaglia, Maria Bagnato, Deborah Donati, Michela Donini, Monica Fiorilli and Liliana Novella

in Schizophrenia Bulletin

Published on behalf of Maryland Psychiatric Research Center

Volume 27, issue 1, pages 59-71
Published in print January 2001 | ISSN: 0586-7614
Published online January 2001 | e-ISSN: 1745-1701 | DOI:
Latent Class Analysis of DSM-IV Schizotypal Personality Disorder Criteria in Psychiatric Patients

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The aim of the study was to evaluate the latent structure of DSM-IV schizotypal personality disorder (SPD) diagnostic criteria. The sample consisted of 564 consecutively admitted inpatients and outpatients. Exploratory latent class analysis identified a four-class model as the best fitting model for DSM-IV SPD criteria. The first of the SPD latent classes was mainly characterized by odd thinking, inappropriate affect, and interpersonal features; the second class by cognitive/perceptual difficulties; the third class by paranoid features; and the fourth class by absence of SPD features. The conditional probability pattern of the four-class solution could be safely replicated across confounder strata. Unlike previous findings, oddness, aloofness, and social withdrawal, rather than positive symptoms, best characterized SPD even in clinical samples.

Keywords: Schizotypal personality disorder; diagnosis; item analysis; latent class analysis; mixture models

Journal Article.  0 words. 

Subjects: Child and Adolescent Psychiatry

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