General anxiety disorder-7 (GAD-7) - Evidencio
General anxiety disorder-7 (GAD-7)
The GAD-7 is a valid and efficient tool for screening for general anxiety disorder and assessing its severity in clinical practice and research.
Research authors: Spitzer RL, Kroenke K, Williams JB, Löwe B.
Version: 1.9
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General anxiety disorder-7 score: points

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Interpretation of results:

  • The 7-item anxiety scale (GAD-7) had good reliability, as well as criterion, construct, factorial, and procedural validity.
  • A cutoff of 10 points was found to result in optimal sensitivity (89%) and specificity (82%) for the detection of anxiety disorder.
  • Increasing scores on the scale were strongly associated with multiple domains of functional impairment.
  • A cut point of 15 or greater maximizes specificity and approximates a prevalence (9%) more in line with current epidemiologic estimates of GAD prevalence in primary care. However, sensitivity at this high cut point is low (48%).
  • In an independant validation study by Rulz et al (2011), the GAD-7 scale was shown to highly correlate not only with specific anxiety but also with disability measures.


Note: The GAD-7 was developed and validated in a primary care setting. Further studies are needed to validate its utility in busy mental health settings and clinical research.



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This algorithm is provided for educational, training and information purposes. It must not be used to support medical decision making, or to provide medical or diagnostic services. Read our full disclaimer.

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