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J Nerv Ment Dis. 2017 May;205(5):390-396. doi: 10.1097/NMD.0000000000000608.

Validity of the Associated Symptom Criteria for Generalized Anxiety Disorder: Observations From the Singapore Mental Health Study.

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*Institute of Mental Health, Singapore; †Department of Psychology, The Chinese University of Hong Kong, Hong Kong, China; ‡Department of Psychology, Utah State University, Logan, UT; and §Research Division, Institute of Mental Health, Singapore.


Previous findings on the diagnostic validity and reliability of generalized anxiety disorder (GAD)-associated symptom criteria suggest need for further evaluation. The current study examined convergent validity and specificity of GAD-associated symptoms in a representative Singapore community sample. The Singapore of Mental Health Study a cross-sectional epidemiological survey conducted among 6166 Singapore residents aged 18 and older. The Composite International Diagnostic Interview version 3.0 was used to diagnose mental disorders. Associated symptoms in the GAD criteria and autonomic hyperactivity symptoms showed convergent validity with a GAD diagnosis. However, associated symptoms of GAD were also linked to major depressive disorder (MDD), bipolar disorder, and obsessive-compulsive disorder, suggesting lack of adequate specificity. The inability of the diagnostic criteria to differentiate GAD from symptoms of other conditions highlights the need to better define its associated symptoms criteria. The relationship of overlapping symptoms between GAD and MDD is also discussed.

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