title: Latent class analysis of DSM-IV schizotypal personality disorder criteria in psychiatric patients.
abstract: 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 fourclass 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.
authors.affiliation: Institute of Psychology, University of Urbino, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Fossati
authors.forename: C
authors.initials: C
authors.lastname: Maffei
authors.forename: M
authors.initials: M
authors.lastname: Battaglia
authors.forename: M
authors.initials: M
authors.lastname: Bagnato
authors.forename: D
authors.initials: D
authors.lastname: Donati
authors.forename: M
authors.initials: M
authors.lastname: Donini
authors.forename: M
authors.initials: M
authors.lastname: Fiorilli
authors.forename: L
authors.initials: L
authors.lastname: Novella
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008960:Models, Psychological; D011569:Psychiatric Status Rating Scales; D012016:Reference Values; D012569:Schizotypal Personality Disorder / Q000145:classification / Q000175:diagnosis*; D012919:Social Behavior