The Inventory of Depression and Anxiety Symptoms (78) is a 99-item self-report measure assessing depression and anxiety symptoms over a 2-week period. The Inventory of Depression and Anxiety Symptoms has shown strong psychometric properties (79). Analyses focused on the 20-item general depression subscale (78,79), which demonstrated excellent internal consistency at baseline (α = 0.86) and follow-up (α = 0.90).
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