Abstract
Objective: The clinician-rated (QIDS-C16) and self-report (QIDS-SR16) versions of the 16-item Quick Inventory of Depressive Symptomatology have been extensively examined in adult populations. This study evaluated both versions of the QIDS and the 17-item Children's Depressive Rating Scale - Revised (CDRS-R) in an adolescent outpatient sample.Method: Both the QIDS-C16 and QIDS-SR16 were completed for the adolescents. Three different methods were used to complete the QIDS-C16: (a) adolescents' responses to clinician interviews; (b) parents' responses to clinician interview; and (c) a composite score using the most pathological response from the two interviews. Both classical and item response theory methods were used. Factor analyses evaluated the dimensionality of each scale.Results: The sample included 140 adolescent outpatients. All versions of the QIDS, save the parent interview, and the CDRS-R were very reliable (α ≥ 0.8). All four versions of the QIDS are reasonably effective and unidimensional. The CDRS-R was clearly at least two-dimensional. The CDRS-R was the most discriminating among low and extremely high levels of depression. The QIDS-SR16 was the most discriminating at moderate levels of depression. There was no relation between the QIDS scores and concurrent Axis III comorbidities.Conclusion: The QIDS-C16 and the QIDS-SR16 are suitable for use in adolescents.
Original language | English (US) |
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Pages (from-to) | 185-194 |
Number of pages | 10 |
Journal | International Journal of Methods in Psychiatric Research |
Volume | 19 |
Issue number | 4 |
DOIs | |
State | Published - Dec 2010 |
Keywords
- Adolescent
- Depression
- Depressive symptom ratings
- Psychometrics
- Quick Inventory of Depressive Symptomatology - clinician-rated
- Quick Inventory of Depressive Symptomatology - self-report
ASJC Scopus subject areas
- Psychiatry and Mental health