N De La Garza1, A John Rush2, B D Grannemann1, M H Trivedi1. 1. Center for Depression Research and Clinical Care, UT Southwestern Medical Center, Dallas, TX, USA. 2. Duke-National University of Singapore, Singapore.
Abstract
OBJECTIVE: To develop a short, 5-item measure of the core symptoms of depression based on the 16-item Quick Inventory of Depressive Symptomatology - Self-Report (QIDS-SR16 ) and to evaluate psychometric properties of this new measure (Very Quick Inventory of Depressive Symptomatology - Self-Report: VQIDS-SR5 ). METHOD: Using data from a convenience sample of the Combining Medications to Enhance Depression Outcomes (CO-MED) trial, we evaluated the psychometric properties of the VQIDS-SR5 , its sensitivity to change, and its comparability to the QIDS-SR16 and clinician-rated scales (QIDS-C16 and VQIDS-C5 ). RESULTS: The VQIDS-SR5 has a single-factor structure with an acceptable internal consistency (Cronbach's alpha: 0.67-0.81). The VQIDS-SR5 was as sensitive to change as its parent scale, then QIDS-SR16 and, detected change at an earlier time frame. Additionally, the VQIDS-SR5 was comparable to the QIDS-SR16 , QIDS-C16 , and VQIDS-C5 . CONCLUSION: The VQIDS-SR5 can effectively evaluate the core symptoms of depression during the course of treatment.
OBJECTIVE: To develop a short, 5-item measure of the core symptoms of depression based on the 16-item Quick Inventory of Depressive Symptomatology - Self-Report (QIDS-SR16 ) and to evaluate psychometric properties of this new measure (Very Quick Inventory of Depressive Symptomatology - Self-Report: VQIDS-SR5 ). METHOD: Using data from a convenience sample of the Combining Medications to Enhance Depression Outcomes (CO-MED) trial, we evaluated the psychometric properties of the VQIDS-SR5 , its sensitivity to change, and its comparability to the QIDS-SR16 and clinician-rated scales (QIDS-C16 and VQIDS-C5 ). RESULTS: The VQIDS-SR5 has a single-factor structure with an acceptable internal consistency (Cronbach's alpha: 0.67-0.81). The VQIDS-SR5 was as sensitive to change as its parent scale, then QIDS-SR16 and, detected change at an earlier time frame. Additionally, the VQIDS-SR5 was comparable to the QIDS-SR16 , QIDS-C16 , and VQIDS-C5 . CONCLUSION: The VQIDS-SR5 can effectively evaluate the core symptoms of depression during the course of treatment.
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