Interview-based ratings of DSM-IV Axis II/DSM-5 Section II Personality Disorder symptoms in consecutively admitted insomnia patients: A comparison study with consecutively admitted psychotherapy patients matched on age and gender.

BACKGROUND: Selected personality features may represent important predisposing as well as perpetuating factors for insomnia, and previous studies stressed the importance to assess personality disorders in insomnia patients. METHODS: In order to evaluate the relationships between DSM-IV Axis II/DSM-5 Section II Personality Disorders (PDs) and insomnia, a sample of 171 consecutively admitted insomnia patients and a sample of 171 psychotherapy patients, matched on age and gender were administered the Italian translation of the Structured Clinical Interview for DSM-IV Axis II Personality Disorders, Version 2.0 (SCID-II). Among insomnia patients, 52.0% (n = 89) received at least one DSM-IV Axis II/DSM-5 Section II PD diagnosis according to SCID-II assessment. RESULTS: Any PD base rate estimate in our insomnia patient sample was significantly and markedly higher than the median and mean base rate estimates for any PD in the general population. Within-group analyses showed that Narcissistic, Not otherwise specified PD, Histrionic PD, and Borderline PD represented the most frequently diagnosed-both dimensionally and categorically-DSM-IV Axis II/DSM-5 Section II PD features in our insomnia patient sample. When continuously-scored PDs were considered, insomnia patients showed a significantly lower number of Paranoid and Borderline PD features than psychotherapy patients; however, the corresponding effect size estimates suggested that these differences were modest. None of the categorically-scored PDs significantly differentiated insomnia patients from psychotherapy patients. CONCLUSIONS: As a whole, our findings seemed to suggest that personality dysfunction may play a role in insomnia, while stressing the need for a dimensional approach to the assessment of maladaptive personality traits even in insomnia patients.

Reliability, Factor Structure, and Associations With Measures of Problem Relationship and Behavior of the Personality Inventory for DSM-5 in a Sample of Italian Community-Dwelling Adolescents.

In order to assess the reliability, factorial validity, and criterion validity of the Personality Inventory for DSM-5 (PID-5) among adolescents, 1,264 Italian high school students were administered the PID-5. Participants were also administered the Questionnaire on Relationships and Substance Use as a criterion measure. In the full sample, McDonald's ω values were adequate for the PID-5 scales (median ω = .85, SD = .06), except for Suspiciousness. However, all PID-5 scales showed average inter-item correlation values in the .20-.55 range. Exploratory structural equation modeling analyses provided moderate support for the a priori model of PID-5 trait scales. Ordinal logistic regression analyses showed that selected PID-5 trait scales predicted a significant, albeit moderate (Cox & Snell R2 values ranged from .08 to .15, all ps < .001) amount of variance in Questionnaire on Relationships and Substance Use variables.

Alexithymia and attachment insecurities in impulsive aggression.

The aims of this study were to develop a new measure of impulsive aggressiveness, and to assess whether this measure was associated with deficits in mentalized affectivity and adult attachment styles in a sample of 637 non-clinical participants. Extending Fonagy and Bateman's (2004) hypothesis, the mediating role of poor affectivity mentalization in the relationship between insecure attachment styles and impulsive aggression was also evaluated. Selected insecure attachment styles (R2(adjusted) = .18, p < .001) and deficits in mentalized affectivity (R(2)(adjusted) = .25, p < .001) were significantly associated with impulsive aggressiveness. The overall regression model accounted for roughly 33% of the variance in impulsive aggressiveness. Mentalization deficits significantly mediated the effects of attachment styles on impulsive aggressiveness, although effect size measures suggested that only partial mediation occurred.