Dimensional Pathological Personality Predicting Personality Disorders: Comparison of the DAPP-BQ and PID-5 Shortened Versions in a Spanish Community Sample

This study explored the psychometric properties of the shortened forms of The Dimensional Assessment of Personality Pathology (DAPP-BQ) and The Personality Inventory for DSM-5 (PID-5) in a large cohort from a Spanish community and compared simultaneously the predictive power with regard to personality disorders (PDs) scores in the International Personality Disorder Examination (IPDE). The IPDE is a self-report inventory of 77 items. Each item measures a criterion and a dimensional score can be obtained for each personality disorder. Both shortened forms (named DAPP-90 and PID-5/SF, respectively) obtained a good structural validity and reliability. Linear regression analysis showed that both questionnaires were predictive of the PDs scores. DAPP-90 factors explained about 25% of PDs variance (37% of the PDs clusters). Facets slightly increased the percentages accounting for PDs variance and clusters to 31% and 43%, respectively. PID-5/SF factors, meanwhile, explained 23% of PDs and 33% of PDs clusters, while the facets accounted for 25% of PDs and 37% of clusters. It is concluded that both questionnaires were good instruments for measuring pathological personality, and predicted a similar part of the variance in PDs. However, given that neither the DAPP-90 nor the PID-5/SF accounted for all the variation in PDs, categorical classification of the broader set of PDs may continue to be desired by some researchers and practicing clinicians.