IDAS_MS_Appendices_6.15.18 – Supplemental material for Clinical Utility of the Inventory of Depression and Anxiety Symptoms (IDAS) (original) (raw)
Related papers
Clinical Utility of the Inventory of Depression and Anxiety Symptoms (IDAS)
Assessment, 2018
Depressive and anxiety disorders are severe and disabling conditions that result in substantial cost and global societal burden. Accurate and efficient identification is thus vital to proper diagnosis and treatment of these disorders. The Inventory of Depression and Anxiety Symptoms (IDAS) is a reliable and well-validated measure that provides dimensional assessment of both mood and anxiety disorder symptoms. The current study examined the clinical utility of the IDAS by establishing diagnostic cutoff scores and severity ranges using a large mixed sample ( N = 5,750). Results indicated that the IDAS scales are good to excellent predictors of their associated Structured Clinical Interview for DSM-IV diagnoses. These findings were replicated using Diagnostic and Statistical Manual of Mental Disorders-Fifth edition (DSM-5) criteria assessed via the Mini-International Neuropsychiatric Interview. We provide three cutoff scores for each scale that can be used differentially depending on t...
2008
Abstract 1. The authors explicated the validity of the Inventory of Depression and Anxiety Symptoms (IDAS; D. Watson et al., 2007) in 2 samples (306 college students and 605 psychiatric patients). The IDAS scales showed strong convergent validity in relation to parallel interview-based scores on the Clinician Rating version of the IDAS; the mean convergent correlations were. 51 and. 62 in the student and patient samples, respectively.
The authors conducted three studies to construct and examine the psychometric properties of a 27-item version of the Mood and Anxiety Symptom Questionnaire-90 (MASQ-90; Watson & Clark, 1991a). The Anxiety Depression Distress Inventory-27 (ADDI-27) contains three empirically derived scales: Positive Affect, Somatic Anxiety, and General Distress, which are relevant dimensions of the tripartite model of affect. Each scale is composed of nine items, and the estimate of scale reliability for each scale score was Z.80 across the three studies. Results of exploratory and confirmatory factor analyses provided adequate support for a 3-factor model. Additional estimates of concurrent validity documented the ADDI-27 scales' convergent and discriminant validity. We also identified three construct relevant correlates for each scale score. Overall, the ADDI-27 appears to be a content valid, reliable, and multidimensional measure of the tripartite model of affect. Concerns regarding the nature and structure of depression and anxiety have received extensive attention in the extant literature (Watson proposed the tripartite model of affect to address some of the concerns regarding the high overlap between anxiety and depression in self-report and clinical data. In particular, the domains of the tripartite model are characterized by symptoms of internalizing disorders: positive affect, negative affect, and anxious-arousal (i.e., physiological hyperarousal). Clinically, low positive affect responses (i.e., the absence of positive affect symptoms such as felt happy, felt optimistic, and felt good) are indicative of depression, and high-level anxious arousal responses (e.g., felt dizzy, hands were shaky, and trouble swallowing) are indicative of anxiety. High-level negative affect responses (e.g., worry, fear, and irritability) account for most of the shared (nonspecific) or overlapping symptoms of anxiety and depression. In terms of measurement, self-report instruments composed of positive affect and anxious arousal components are expected to have low to moderate negative correlations (i.e., rs typically range from À.35 to À.50; Cohen, 1988) among the derived scale scores (Keogh & Reidy, 2000). Furthermore, scores on self-report instruments composed of predominantly negative affect components are expected to be associated substantially (rs 5 .45 to .75) with scores on instruments designed to assess a range of mixed depression and anxiety responses, as
Journal of clinical psychology, 2018
The present study developed normative data for the expanded version of the Inventory of Depression and Anxiety Symptoms (IDAS-II). The IDAS-II is a self-report measure containing 18 factor-analytically derived scales, each assessing a specific symptom of internalizing disorders, including depression, anxiety disorders, OCD, bipolar disorder, and PTSD. These normative data were used to examine group differences in internalizing symptoms across demographic characteristics. A total of 1,836 Mechanical Turk users (47.6% male; mean age = 35.6) completed the IDAS-II; the sample was weighted to be representative of the U.S. population on gender, age, and race/ethnicity. Percentiles were derived for each of the IDAS-II scales. Age was the demographic characteristic most consistently associated with lower internalizing symptoms. The present study provides information on the distribution of specific internalizing symptoms in a large national sample, as well as on how these symptoms are relate...
Patient Health Questionnaire Anxiety and Depression Scale
PsycTESTS Dataset, 2016
Objective-We examine the reliability and validity of the Patient Health Questionnaire Anxiety-Depression Scale (PHQ-ADS)-which combines the PHQ-9 and GAD-7 scales-as a composite measure of depression and anxiety. Methods-Baseline data from 896 patients enrolled in 2 primary-care based trials of chronic pain and 1 oncology-practice based trial of depression and pain were analyzed. The internal reliability, standard error of measurement (SEM), and convergent, construct, and factor structure validity, as well as sensitivity to change of the PHQ-ADS were examined. Results-The PHQ-ADS demonstrated high internal reliability (Cronbach's alpha of 0.8 to 0.9) in all 3 trials. PHQ-ADS scores can range from 0 to 48 (with higher scores indicating more severe depression/anxiety), and the estimated SEM was approximately 3 to 4 points. The PHQ-ADS showed strong convergent (most correlations 0.7-0.8 range) and construct (most correlations 0.4-0.6 range) validity when examining its association with other mental health, quality of life and disability measures. PHQ-ADS cutpoints of 10, 20, and 30 indicated mild, moderate, and severe levels of depression/anxiety, respectively. Bi-factor analysis showed sufficient unidimensionality of the PHQ-ADS score. PHQ-ADS change scores at 3 months differentiated (P < .0001) between individuals classified as worse, stable, or improved by a reference measure, providing preliminary evidence for sensitivity to change. Conclusions-The PHQ-ADS may be a reliable and valid composite measure of depression and anxiety which, if validated in other populations, could be useful as a single measure for jointly assessing two of the most common psychological conditions in clinical practice and research.
Journal of Clinical Psychology, 2011
The authors conducted three studies to construct and examine the psychometric properties of a 27-item version of the Mood and Anxiety Symptom Questionnaire-90 (MASQ-90; Watson & Clark, 1991a). The Anxiety Depression Distress Inventory-27 (ADDI-27) contains three empirically derived scales: Positive Affect, Somatic Anxiety, and General Distress, which are relevant dimensions of the tripartite model of affect. Each scale is composed of nine items, and the estimate of scale reliability for each scale score was Z.80 across the three studies. Results of exploratory and confirmatory factor analyses provided adequate support for a 3-factor model. Additional estimates of concurrent validity documented the ADDI-27 scales' convergent and discriminant validity. We also identified three construct relevant correlates for each scale score. Overall, the ADDI-27 appears to be a content valid, reliable, and multidimensional measure of the tripartite model of affect.
Journal of Personality Assessment, 2017
Three studies examining the factor structure and psychometric properties of the Anxiety Depression Distress Inventory-27 (ADDI-27) extended the initial instrument development studies for this recently introduced inventory. The ADDI-27 is an empirically derived short form of the Mood and Anxiety Questionaire-90 (MASQ-90) comprising three scales: Positive Affect, Somatic Anxiety, and General Distress. The main objectives of Study 1 (N = 700) were to examine the factor structure of the ADDI-27 and its measurement invariance across gender at the item level. The objective of Study 2 (N = 538) was to examine evidence for the convergent and discriminant validity of scores on the ADDI-27. The objective of Study 3 (N = 240) was to assess further evidence for the nomological network and convergent and discriminant validity of the ADDI-27 scores. Results of exploratory structural equation modeling yielded strong support for a 3-factor model, with approximate fit indexes meeting or exceeding the conventional cutoffs. With p ≤ .001 as the criterion for detecting noninvariance, results of measurement invariance analysis suggested that all of the ADDI-27 items were invariant across gender. Results of multivariate validity analyses across 2 studies provided support for the convergent and discriminant validity of scores on the ADDI-27 scales. Depression and anxiety are each associated with impaired social functioning and reduced quality of life (Kroenke, Spitzer, Williams, Monahan, & Löwe, 2007; Strine et al., 2008). In addition, anxiety disorder is frequently comorbid with major depressive disorder, with comorbidity prevalence estimates ranging from 50% to 60% (Hirschfeld, 2001; Kessler, Chiu, Demler, & Walters, 2005). When subdiagnostic symptomatology is taken into account, the prevalence of comorbidity might be 5% to 7% higher (Gorman, 1996; Kessler, Berglund, et al., 2005). The high comorbidity rate indicates that presentation with depressive symptoms should be considered a risk factor for the development of anxiety symptoms, and vice versa (Cameron, 2007). Furthermore, individuals with comorbid anxiety and depression might experience increased difficulty performing routine activities of daily living (
Psychiatry Research, 2009
The Mental Health Inventory (MHI)-5 is an attractive, brief screening questionnaire for depression and anxiety disorders. It has been suggested that the three questions on depression (MHI-d) may be as good as the full MHI-5 in assessing depressive disorders. We examined the validity of the MHI-d and the MHI-a (the remaining two items on anxiety) in a large population-based sample of 7076 adults in the Netherlands. We also examined the validity of the MHI in assessing specific anxiety disorders. The presence of depressive and anxiety disorders in the past month was assessed with the Composite International Diagnostic Interview (CIDI), computerized version 1.1. ROC analyses indicated no significant difference between the MHI-5 (area under the curve of 0.93) and the MHI-d (area under the curve of 0.91) in detecting major depression and dysthymia. There was no difference either between the MHI-5 (area under the curve of 0.73) and the MHI-a (area under the curve 0.73) in detecting anxiety disorders. Both the MHI-5 and the MHI-a also seem to be adequate as a screener for some anxiety disorders (generalized anxiety disorder; panic disorder; obsessivecompulsive disorder), but not others, especially phobias (agoraphobia; social phobia; simple phobia).