title: The Swedish Depressive Personality Disorder Inventory: psychometrics and clinical correlates from a DSM-IV and proposed DSM-5 perspective.
abstract: BACKGROUND
  Depressive personality is commonly seen in clinical practice, and today only one exclusive self-report instrument-the Depressive Personality Disorder Inventory (DPDI)-is available for its assessment based on the DSM-IV description of the construct.
  
  
  OBJECTIVE
  The purpose of this research was to evaluate a Swedish version of this measure (DPDI-Swe) in terms of its reliability, internal structure, and convergent validity using related variables from the DSM-IV criteria for depressive personality disorder (DPD) and the proposed DPD trait set for DSM-5.
  
  
  METHODS
  A non-clinical sample of 255 adults in southern Sweden completed a self-report package, which, in addition to DPD, included the assessment of self-esteem, optimism, hope, rumination, worry, depression, and anxiety. Quality of life was also measured.
  
  
  RESULTS
  Results indicated that the DPDI-Swe was internally consistent (α = 0.96). Exploratory factor analysis with oblique rotation yielded three components, together accounting for 48.21% of the variance in DPDI-Swe scores. There were strong positive associations between the DPDI-Swe and measures of depression, anxiety, rumination, and worry, and strong negative associations between the DPDI-Swe and measures of self-esteem, optimism, hope, and quality of life. These significant relationships remained, albeit slightly diminished, after statistically controlling for current depressed mood.
  
  
  CONCLUSIONS
  The DPDI-Swe appears to be a reliable and valid measure of DPD, and it is available for clinical and research use.
authors.affiliation: Department of Psychology, Lund University, Lund, Sweden. Rachel.Maddux@psychology.lu.se
authors.forename: Rachel E
authors.initials: RE
authors.lastname: Maddux
authors.forename: Lars-Gunnar
authors.initials: LG
authors.lastname: Lundh
authors.forename: Martin
authors.initials: M
authors.lastname: Bäckström
mesh_terms: D000328:Adult; D003866:Depressive Disorder / Q000175:diagnosis*; D039721:Diagnostic and Statistical Manual of Mental Disorders; D019263:Dysthymic Disorder; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010551:Personality; D010554:Personality Disorders / Q000175:diagnosis*; D010555:Personality Inventory / Q000592:standards / Q000706:statistics & numerical data*; D011594:Psychometrics / Q000295:instrumentation; D011788:Quality of Life; D015203:Reproducibility of Results; D013548:Sweden; D055815:Young Adult