Abstract
Inventory of Depression and Anxiety Symptoms-II (IDAS-II) constitutes a useful measurement tool with demonstrated psychometric properties that is contributing to the advancement of knowledge of emotional disorders within transdiagnostic models. To implement its use in clinical settings it is important that the scores can be interpreted in order to guide clinical decisions. This study aims to develops normative data for the Spanish version of the IDAS-II. An anonymous online survey was applied to 1,072 subjects, recruited through a stratified random sampling procedure taking into account population gender, age, and geographical region of Spain. Results show that women tend to score higher than men, particularly on the Dysphoria, General Depression, Appetite Gain, and Lassitude scales. Largest effect sizes for differences in the scores according to age were found for Lassitude, Dysphoria, and General Depression. Therefore, normative data according to gender and age group for each IDAS-II scale is provided. The norms provided in this work complement those already available, facilitating the decision-making of clinical professionals. Evidence of unidimensionality is provided for the 19 IDAS-II scales that allows researchers and clinicians to use specific IDAS-II scales independently.
Highlights
Emotional disorders such as depression and anxiety constitute some of the most prevalent psychopathological conditions (World Health Organization., 2017)
Statistical significance is driven more by sample size than effect size, since 12 of the 19 comparisons with the Nelson et al study overlapping contents: in the Suicidality scale, Items 22 and 38 refer to self-directed harmful actions or behaviors, while the rest of the items refer to thoughts (RMSEA = 0.14; RMSR = 0.05; Comparative Fit Index (CFI) = 0.94; Tucker Lewis Index (TLI) = 0.89)
The lowest values correspond to the General Depression composite scale (RMSEA = 0.11; RMSR = 0.08; CFI = 0.79; TLI = 0.76)
Summary
Emotional disorders such as depression and anxiety constitute some of the most prevalent psychopathological conditions (World Health Organization., 2017). These disorders are more disabling and result in a poorer quality of life when compared with other mental disorders such as alcohol use disorder or somatoform disorders and chronic diseases such as diabetes, arthritis, or asthma (Alonso et al, 2004; Moussavi et al, 2007; Grandes et al, 2011). Treatment of this comorbidity has been facilitated by transdiagnostic interventions [e.g., the Unified Protocol–(UP), (Barlow et al, 2011)] These have been shown to be effective in simultaneously treating several emotional. A recent systematic review revealed that interventions such as the UP (Sakiris and Berle, 2019) are highly effective in reducing the severity of various emotional disorders [e.g., anxiety, depression, general anxiety disorder (GAD), obsessive-compulsive disorder (OCD), panic disorder (PD), and social anxiety disorder], indicating the greater efficiency of this approach in comparison with disorder-specific interventions (Barlow et al, 2017)
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