title: Prospective investigation of a PTSD personality typology among individuals with personality disorders.
abstract: This study investigated the replicability of a previously proposed personality typology of posttraumatic stress disorder (PTSD, and explored stability of cluster membership over a 6-month period. Participants with current PTSD (n = 156) were drawn from the Collaborative Longitudinal Personality Disorders Study (CLPS). The CLPS project tracked a large sample of individuals who met criteria for 1 of 4 target diagnoses (borderline, schizotypal, avoidant, and obsessive-compulsive) and a contrast group of individuals who met criteria for depression but no personality disorder. A cluster analysis using scales from the Schedule of Nonadaptive and Adaptive Personality yielded 3 clusters: "internalizing," "externalizing," and "low pathology." Using K-means cluster analysis, the results did not replicate previous work. Using Ward's method, the hypothesized 3-cluster structure was confirmed at baseline but did not demonstrate temporal stability at 6 months.
authors.affiliation: Department of Psychology, University of Memphis, Memphis, TN 38152, USA. mmcdvttm@memphis.edu
authors.forename: Meghan E
authors.initials: ME
authors.lastname: McDevitt-Murphy
authors.forename: M Tracie
authors.initials: MT
authors.lastname: Shea
authors.forename: Shirley
authors.initials: S
authors.lastname: Yen
authors.forename: Carlos M
authors.initials: CM
authors.lastname: Grilo
authors.forename: Charles A
authors.initials: CA
authors.lastname: Sanislow
authors.forename: John C
authors.initials: JC
authors.lastname: Markowitz
authors.forename: Andrew E
authors.initials: AE
authors.lastname: Skodol
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D016000:Cluster Analysis; D015897:Comorbidity; D005260:Female; D006801:Humans; D007175:Impulsive Behavior / Q000453:epidemiology; D008297:Male; D008960:Models, Psychological; D009511:New England / Q000453:epidemiology; D010554:Personality Disorders / Q000453:epidemiology*; D011446:Prospective Studies; D015203:Reproducibility of Results; D013313:Stress Disorders, Post-Traumatic / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology*; D013694:Temperament