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Diagnosis
The GAD-7 scale was accurate for diagnosing generalised anxiety disorder

https://doi.org/10.1136/ebm.11.6.184

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    Spitzer RL, Kroenke K, Williams JB, et al. A brief measure for assessing generalised anxiety disorder: the GAD-7. Arch Intern Med 2006;166:1092–7.
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 Q What is the diagnostic accuracy of the Generalised Anxiety Disorder (GAD)-7 scale?

    Clinical impact ratings GP/FP/Mental health ★★★★★★☆ Psychiatry ★★★★★★☆

    METHODS

    Embedded ImageDesign:

    blinded comparison of the GAD-7 scale with GAD criteria from the DSM-IV.

    Embedded ImageSetting:

    13 family practices and 2 internal medicine clinics in the US.

    Embedded ImagePatients:

    a random sample of 965 out of 2739 patients 18–95 years of age (mean age 47 y, 65% women, 80% white) who completed a study questionnaire including the GAD-7 scale were evaluated with the diagnostic standard.

    Embedded ImageDescription of test:

    the GAD-7 scale: patients rate answers (0 = not at all, 1 = several days, 2 = more than half the days, 3 = nearly every day) to 7 anxiety related questions; how often in the past …

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    Footnotes

    • For correspondence: Dr R L Spitzer, New York State Psychiatric Institute, New York, NY, USA. RLS8{at}Columbia.edu

    • Source of funding: Pfizer Inc.