title: A confirmatory factor analysis of the Beck Depression Inventory-II in end-stage renal disease patients.
abstract: OBJECTIVE
  We sought to examine several competing factor structures of the Beck Depression Inventory-II (BDI) in a sample of patients with End-Stage Renal Disease (ESRD), in which setting the factor structure is poorly defined, though depression symptoms are common. In addition, demographic and clinical correlates of the identified factors were examined.
  
  
  METHODS
  The BDI was administered to clinical sample of 460 ESRD patients attending 4 UK renal centres. Competing models of the factor structure of the BDI were evaluated using confirmatory factor analysis.
  
  
  RESULTS
  The best fitting model consisted of general depression factor that accounted for 81% of the common variance between all items along with orthogonal cognitive and somatic factors (G-S-C model, CFI=.983, TLI=.979, RMSEA=.037), which explained 8% and 9% of the common variance, respectively. Age, diabetes, and ethnicity were significantly related to the cognitive factor, whereas albumin, dialysis adequacy, and ethnicity were related to the somatic factor. No demographic or clinical variable was associated with the general factor.
  
  
  CONCLUSIONS
  The general-factor model provides the best fitting and conceptually most acceptable interpretation of the BDI. Furthermore, the cognitive and somatic factors appear to be related to specific demographic and clinical factors.
authors.affiliation: School of Psychology, University of Hertfordshire, UK. j.chilcot@herts.ac.uk
authors.forename: Joseph
authors.initials: J
authors.lastname: Chilcot
authors.forename: Sam
authors.initials: S
authors.lastname: Norton
authors.forename: David
authors.initials: D
authors.lastname: Wellsted
authors.forename: Mike
authors.initials: M
authors.lastname: Almond
authors.forename: Andrew
authors.initials: A
authors.lastname: Davenport
authors.forename: Ken
authors.initials: K
authors.lastname: Farrington
mesh_terms: D000368:Aged; D003071:Cognition; D003863:Depression / Q000175:diagnosis* / Q000523:psychology*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000523:psychology* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D010555:Personality Inventory / Q000592:standards*; D006435:Renal Dialysis / Q000523:psychology*; D015203:Reproducibility of Results; D012720:Severity of Illness Index