Title: The 16-Item quick inventory of depressive symptomatology (QIDS), clinician rating (QIDS-C), and self-report (QIDS-SR): a psychometric evaluation in patients with chronic major depression
Abstract: <h2>Abstract</h2><h3>Background</h3> 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-SR<sub>16</sub>) and clinician-rated (QIDS-C<sub>16</sub>) formats. <h3>Methods</h3> This report evaluates and compares the psychometric properties of the QIDS-SR<sub>16</sub> in relation to the IDS-SR<sub>30</sub> and the 24-item Hamilton Rating Scale for Depression (HAM-D<sub>24</sub>) in 596 adult outpatients treated for chronic nonpsychotic, major depressive disorder. <h3>Results</h3> Internal consistency was high for the QIDS-SR<sub>16</sub> (Cronbach's α = .86), the IDS-SR<sub>30</sub> (Cronbach's α = .92), and the HAM-D<sub>24</sub> (Cronbach's α = .88). QIDS-SR<sub>16</sub> total scores were highly correlated with IDS-SR<sub>30</sub> (.96) and HAM-D<sub>24</sub> (.86) total scores. Item–total correlations revealed that several similar items were highly correlated with both QIDS-SR<sub>16</sub> and IDS-SR<sub>30</sub> total scores. Roughly 1.3 times the QIDS-SR<sub>16</sub> total score is predictive of the HAM-D<sub>17</sub> (17-item version of the HAM-D) total score. <h3>Conclusions</h3> The QIDS-SR<sub>16</sub> was as sensitive to symptom change as the IDS-SR<sub>30</sub> and HAM-D<sub>24</sub>, indicating high concurrent validity for all three scales. The QIDS-SR<sub>16</sub> has highly acceptable psychometric properties, which supports the usefulness of this brief rating of depressive symptom severity in both clinical and research settings.
Publication Year: 2003
Publication Date: 2003-04-23
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 3331
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