Concurrent and prospective prediction of community-dwelling adults' psychosocial functioning with the Inventory of Depression and Anxiety Symptoms-II (IDAS-II).

Mood and anxiety disorders involve defining symptoms (e.g., dysphoria, anhedonia) that can impair psychosocial functioning (e.g., self-care, work, social relationships). The present study evaluated the validity of the Inventory of Depression and Anxiety Symptoms-II (IDAS-II; Watson et al., 2012) via convergence with a semistructured interview assessing mood and anxiety disorder symptoms and, moreover, prediction of psychosocial functioning. Community-dwelling adults (N = 601) completed the self-report IDAS-II, a semistructured diagnostic interview, and self-report and interview measures of psychosocial functioning. A retest subsample (ns = 497-501) completed the functioning measures again, on average 8 months later. Supporting our hypotheses, the IDAS-II converged robustly with interview-assessed symptoms and predicted psychosocial functioning significantly, both concurrently and prospectively. Moreover, the IDAS-II predicted functioning significantly better than did the diagnostic interview. These findings support use of the IDAS-II in research and clinical settings to assess mood and anxiety symptoms and their connections to psychosocial impairment. (PsycInfo Database Record (c) 2024 APA, all rights reserved).