title: Comparison of self-report and clinician ratings on two inventories of depressive symptomatology.
abstract: OBJECTIVE
  This study evaluated the concordance between the self-report and the clinician-rated versions of the Inventory of Depressive Symptomatology (IDS-30) and between the two versions of the briefer 16-item Quick Inventory of Depressive Symptomatology (QIDS-16).
  
  
  METHODS
  Data were gathered for 544 adult outpatients with psychotic (N = 106) or nonpsychotic (N = 438) major depressive disorder at 14 public sector mental health clinics in the Texas Medication Algorithm Project. Data for the QIDS-16 were extracted from the IDS-30. Baseline scores and scores from the final study visit at or before month 12 were analyzed. The clinician-rated and the self-report versions of each scale were compared in their identification of response to treatment and remission.
  
  
  RESULTS
  The average baseline IDS-SR-30 total score was 2.2 points higher (indicating greater severity) than the IDS-C-30 score; the average QIDS-SR-16 total score was only .3 points higher than the QIDS-C-16 score. The IDS-SR-30 and the IDS-C-30, as well as the QIDS-C-16 and QIDS-SR-16, agreed substantially in classifying response and remission for patients, regardless of whether the patients had psychotic features. None of a large number of clinical and demographic features accounted for differences between the QIDS-SR-16 and QIDS-C-16 total scores.
  
  
  CONCLUSIONS
  Either the IDS-30 or the QIDS-16 self-report adequately assesses depressive symptom severity among public-sector outpatients with major depressive disorder. The briefer QIDS-16 may be preferred to save time and cost.
authors.affiliation: Dallas.
authors.forename: A John
authors.initials: AJ
authors.lastname: Rush
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Carmody
authors.forename: Hisham M
authors.initials: HM
authors.lastname: Ibrahim
authors.forename: Madhukar H
authors.initials: MH
authors.lastname: Trivedi
authors.forename: Melanie M
authors.initials: MM
authors.lastname: Biggs
authors.forename: Kathy
authors.initials: K
authors.lastname: Shores-Wilson
authors.forename: M Lynn
authors.initials: ML
authors.lastname: Crismon
authors.forename: Marcia G
authors.initials: MG
authors.lastname: Toprac
authors.forename: T Michael
authors.initials: TM
authors.lastname: Kashner
mesh_terms: D000328:Adult; D003710:Demography; D003863:Depression / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology; D003865:Major Depressive Disorder / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006282:Health Personnel; D006801:Humans; D008297:Male; D015588:Observer Variation; D011618:Psychotic Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D012650:Self Disclosure; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires