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Title: Psychometric Evidence of The 7-Item Generalized Anxiety Disorder Questionnaire in Brazil
Authors: Monteiro, R
Da Silva Nascimento, B
Medeiros Costa Monteiro, T
Dyamond Gomes da Silva, P
Candida Ferreira, AJ
Keywords: Generalized anxiety disorder;mental health;GAD-7;psychometrics;validity
Issue Date: 24-Nov-2020
Publisher: Springer
Citation: International Journal of Mental Health and Addiction, 2020, 20 pp. 1023 - 1034 (12)
Abstract: Generalized Anxiety Disorder (GAD) is one of the most prevalent and 1 impairing psychological disorders. GAD is defined as a persistent and excessive worry 2 associated with physical and psychological symptoms. Despite the potentially severe 3 nature of GAD, it has been estimated that nearly half of patients live with the symptoms 4 for about two years before being appropriately diagnosed and treated. To allow early 5 identification of this disorder, valid and reliable measures for the screening of GAD are 6 essential. Therefore, the present study aimed to gather psychometric evidence of the 7-7 Item Generalized Anxiety Disorder Questionnaire (GAD-7) in Brazil (N = 746). The 8 findings suggested a stable one-factor structure (CFI = .99; TLI = .99; RMSEA = .05) 9 that is likely to be replicated (H-Latent = .92; H-Observed = .86) and have excellent 10 reliability (ω = .91; CR = .91). Furthermore, the GAD-7 correlated positively with the 11 DASS-21 stress (r = .73), depression (r = .53), and anxiety (r = .60) factors, along with 12 the Groningen Sleep Quality Scale (r = .45) and the personality trait of neuroticism (r = 13 .49), supporting its convergent validity. Finally, the GAD-7 is able to differentiate 14 between participants with mild, moderate and severe level of anxiety. Taken together, 15 the present findings indicate that the GAD-7 is a suitable psychometric measure to 16 assess generalized anxiety disorder in Brazil.
ISSN: 1557-1874
Appears in Collections:Dept of Life Sciences Research Papers

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