title: [A comparative psychometric study of the Spanish versions with 6, 17, and 21 items of the Hamilton Depression Rating Scale].
abstract: OBJECTIVE
  Former Spanish studies on the Hamilton Depression Rating Scale (HDRS) have focused on the 17 items version and have been conducted in depressive in-patient series. This study compares the psychometric properties of the Spanish version of HDRS with 6, 17 and 21 items as assessed in depressive patients in ambulatory care.
  
  
  METHODS
  A prospective, observational and multicenter study was conducted in clinically stable or unstable depressed patients. The discriminative validity, reliability (internal consistency, test-retest and inter-raters) and sensitivity to change were assessed.
  
  
  RESULTS
  One hundred and sixty eight patients from 15 psychiatric facilities were included. The 6, 17 and 21 items versions of HDRS showed appropriate discriminative validity (HDRS-Clinical Global Impression: p < 0.0001); internal consistency (Cronbach *: HDRS-6 = 0.6; HDRS-17 and 21 >= 0.7); test-retest reliability (intraclass correlation coefficient [ICC]: HDRS-6, 17 and 21 >= 0.9); inter-raters reliability (ICC: HDRS-6, 17 and 21 >= 0.9) and sensitivity to change (effect size >= 1.5 for HDRS-6, 17 and 21).
  
  
  CONCLUSIONS
  Spanish versions of HDRS with 6, 17 and 21 items show similar psychometric properties. HDRS-6 could be useful in ambulatory and primary care.
authors.affiliation: Area de Psiquiatría. Facultad de Medicina. Universidad de Oviedo. Oviedo. España.
authors.forename: Julio
authors.initials: J
authors.lastname: Bobes
authors.forename: Antonio
authors.initials: A
authors.lastname: Bulbena
authors.forename: Antonio
authors.initials: A
authors.lastname: Luque
authors.forename: Rafael
authors.initials: R
authors.lastname: Dal-Ré
authors.forename: Javier
authors.initials: J
authors.lastname: Ballesteros
authors.forename: Nora
authors.initials: N
authors.lastname: Ibarra
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D003865:Major Depressive Disorder / Q000175:diagnosis*; D016002:Discriminant Analysis; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D019370:Observation; D011446:Prospective Studies; D011594:Psychometrics / Q000379:methods*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires