Commonality and specificity of personality disorder profiles in subjects with trauma histories

Recently, attention has been drawn to a range of disturbances in personality functioning that commonly characterize individuals with a history of severe or prolonged trauma. Many of these features overlap with criteria for some of the Axis II personality disorders. The current study investigated the similarity of personality disorder features in different samples of patients with trauma histories, and specificity of such features compared to other psychiatric samples. Profiles of Axis II features, based on relative frequencies of individual disorder "diagnoses" derived from a common measure (Personality Diagnostic Questionnaire-Revised), were compared in three trauma samples: male Vietnam combat veterans with PTSD, female inpatients with a history of childhood sexual abuse, and female outpatients with a history of childhood sexual abuse. The PDQ-R derived profiles in each of the three trauma samples were then compared with similar PDQ-R derived profiles in published reports of psychiatric samples selected for other diagnoses. Each of the three Spearman rank correlations among the three trauma samples were significant, ranging from .72 to .94. There was a clear pattern of higher correlations within the trauma samples (average correlation of .81) than between the trauma and nontrauma samples (average correlations of .11, .36, and .25 between the nontrauma samples and the combat sample, inpatient sexual abuse sample, and outpatient sexual abuse sample, respectively). The findings suggest that a pattern of personality disorder features may be distinctly associated with individuals with trauma histories, at least of the type examined here. Future studies using more clinically valid measures of personality features and including other types of trauma samples are needed to determine the generalizability of the current findings. Also needed are studies with longitudinal designs to address questions of causal pathways that may underlie such associations.