Journal
PSYCHIATRY RESEARCH
Volume 256, Issue -, Pages 312-317Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.psychres.2017.06.023
Keywords
Screening; Generalized anxiety disorder; GAD-7; Primary care; Criterion validity; Computerized instruments
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Funding
- Ministerio de Economia y Competitividad
- Psicofundacion, Foundation for the Scientific and Professional Development of Psychology in Spain
- Fundacion Mutua Madrilena
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The aim of the study was to determine the criterion validity of a computerized version of the General Anxiety Disorder-7 (GAD-7) questionnaire to detect general anxiety disorder in Spanish primary care centers. A total of 178 patients completed the GAD-7 and were administered the Composite International Diagnostic Interview (CIDI) for DSM-IV Axis I Disorders, which was used as a reference standard. Sensitivity, specificity, positive and negative predictive values, and positive and negative likelihood ratios were calculated. A cut-off of 10 yielded a sensitivity of .87, a specificity of .78, a positive predictive value of .93, a negative predictive value of .64, a positive likelihood ratio of 3.96 a negative likelihood ratio of s.17 and Younden's Index of .65. The GAD-7 performed very well with a cut-off value of 10, the most frequently used cut-off point. Thus, a computerized version of the GAD-7 is an excellent screening tool for detecting general anxiety disorder in Spanish primary care settings.
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