The Spanish version of the Quick Inventory of Depressive Symptomatology-Self-Report (QIDS-SR<inf>16</inf>): A psychometric analysis in a clinical sample

Joan Trujols, Javier De Diego-Adeliño, Albert Feliu-Soler, Ioseba Iraurgi, Dolors Puigdemont, Enric Álvarez, Víctor Pérez, Maria J. Portella

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

© 2014 Elsevier B.V. Background Psychometrically robust and easy-to-administer scales for depressive symptoms are necessary for research and clinical assessment. This is a psychometric study of the Spanish version of the Quick Inventory of Depressive Symptomatology-Self-Report (QIDS-SR16) in a clinical sample. Method One-hundred and seventy-three patients (65% women) with a psychiatric disorder including depressive symptoms were recruited. Such symptoms were assessed by means of the QIDS-SR16 and two interviewer-rated instruments: the 17-item Hamilton Depression Rating Scale (HDRS17) and the Clinical Global Impression-Severity (CGI-S) scale. Self-rated measures of health-related quality of life, subjective happiness and perceived social support were also obtained. Dimensionality, internal consistency, construct validity, criterion validity, and responsiveness to change of the QIDS-SR16 were examined. Results Exploratory and confirmatory factor analyses replicated the original one-factor structure. The Spanish version of the QIDS-SR16 showed good to excellent internal consistency (α=0.88), convergent validity [HDRS17 (r=0.77), CGI-S (r=0.78)], and divergent validity [EuroQol-5D Visual Analogue Scale (r=-0.78), Subjective Happiness Scale (r=-0.72)]. The QIDS-SR16 was excellent in discriminating clinically significant from non-significant depressive symptomatology (area under ROC curve=0.93). It also showed a high sensitivity to treatment-related changes: patients with greater clinical improvement showed a greater decrease in QIDS-SR16 scores (p<0.001). Limitations The study was conducted in a single center, which may limit the generalizability of the findings. Conclusions The Spanish version of the QIDS-SR16 retains the soundness of metric characteristics of the original version which makes the scale an invaluable instrument to assess depressive symptoms.
Original languageEnglish
Pages (from-to)189-196
JournalJournal of Affective Disorders
Volume169
DOIs
Publication statusPublished - 1 Dec 2014

Keywords

  • Affective disorders
  • Assessment
  • Depressive symptoms
  • Psychometric study
  • Self-report

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