Abstract
Background: The 16-item Quick Inventory of Depressive Symptomatology (QIDS), a new measure of depressive symptom severity derived from the 30-item Inventory of Depressive Symptomatology (IDS), is available in both self-report (QIDS-SR16) and clinician-rated (QIDS-C16) formats. Methods: This report evaluates and compares the psychometric properties of the QIDS-SR16 in relation to the IDS-SR30 and the 24-item Hamilton Rating Scale for Depression (HAM-D24) in 596 adult outpatients treated for chronic nonpsychotic, major depressive disorder. Results: Internal consistency was high for the QIDS-SR16 (Cronbach's α = .86), the IDS-SR30 (Cronbach's α = .92), and the HAM-D24 (Cronbach's α = .88). QIDS-SR16 total scores were highly correlated with IDS-SR30 (.96) and HAM-D 24 (.86) total scores. Item-total correlations revealed that several similar items were highly correlated with both QIDS-SR16 and IDS-SR30 total scores. Roughly 1.3 times the QIDS-SR16 total score is predictive of the HAM-D17 (17-item version of the HAM-D) total score. Conclusions: The QIDS-SR16 was as sensitive to symptom change as the IDS-SR30 and HAM-D24, indicating high concurrent validity for all three scales. The QIDS-SR16 has highly acceptable psychometric properties, which supports the usefulness of this brief rating of depressive symptom severity in both clinical and research settings.
Original language | English (US) |
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Pages (from-to) | 573-583 |
Number of pages | 11 |
Journal | Biological Psychiatry |
Volume | 54 |
Issue number | 5 |
DOIs | |
State | Published - Sep 1 2003 |
Keywords
- Chronic major depression
- Concurrent validity
- Psychometric properties
- Quick Inventory of Depressive Symptomatology
- Self-reports
- Symptom severity
ASJC Scopus subject areas
- Biological Psychiatry