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Gepubliceerd in:

10-09-2016

Psychometric Properties of the Generalized Anxiety Disorder Scale-7 (GAD-7) in Outpatients with Anxiety and Mood Disorders

Auteurs: Lauren A. Rutter, Timothy A. Brown

Gepubliceerd in: Journal of Psychopathology and Behavioral Assessment | Uitgave 1/2017

Abstract

This study examined the psychometric properties of the Generalized Anxiety Disorder Scale-7 (GAD-7) in a sample of 536 outpatients presenting at a specialty clinic for anxiety and mood disorders. A confirmatory factor analysis (CFA) was used to test the unidimensionality of the GAD-7. This model did not fit the data well. The CFA solution was respecified correlating residuals among items assessing somatic symptoms. This respecified model fit the data well. A series of multiple-groups CFAs determined that the measurement properties of the GAD-7 were invariant between sexes. Scale reliability estimates of the GAD-7 were favorable for the full sample, and for males and females. Sensitivity and specificity could not be balanced at any cut-point. Findings attest to the value of this instrument as a dimensional indicator of GAD severity rather than a screening tool for the presence or absence of the disorder in outpatients with anxiety and mood disorders.

vorige artikel Reevaluating Suicidal Behaviors: Comparing Assessment Methods to Improve Risk Evaluations

volgende artikel A Systematic Review of the Psychometric Properties of Trait Cognitive Self-Report Measures in Social Anxiety

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To address this issue, we tested the relationship between the GAD-7 and high negative affect/neuroticism using the Neuroticism scale from the NEO Five Factor Inventory (NFFI-N). Although the NFFI-N was moderately correlated with the GAD-7 factor (r = .56), inferential tests of the differential magnitude of relationships indicated that the GAD-7 factor was more strongly correlated with the DASS-S (r = .68, z = 4.50, p < .001) and the PSWQ (r = .66, z = 3.93, p < .001) than the NFFI-N. Although providing support for the convergent validity of the GAD-7, the results also indicated that the GAD-7 factor was more strongly correlated with the NFFI-N than with the DASS-D (r = .47, z = 2.97, p < .01) and the OCD-R (r = .42, z = 3.40, p < .001) in accord with the notion that GAD is more closely related to neuroticism than other emotional disorders (e.g., major depressive disorder, OCD). The test of the differential magnitude of correlations involving the GAD-7 and NFFI-N with the DASS-A was not significant (r = .52, z = 0.85).

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Titel: Psychometric Properties of the Generalized Anxiety Disorder Scale-7 (GAD-7) in Outpatients with Anxiety and Mood Disorders
Auteurs: Lauren A. Rutter
Timothy A. Brown
Publicatiedatum: 10-09-2016
Uitgeverij: Springer US
Gepubliceerd in: Journal of Psychopathology and Behavioral Assessment / Uitgave 1/2017
Print ISSN: 0882-2689
Elektronisch ISSN: 1573-3505
DOI: https://doi.org/10.1007/s10862-016-9571-9

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