GAD-7

Spitzer RL, Kroenke K, Williams JB, Löwe B. A brief measure for assessing generalized anxiety disorder: the GAD-7. Seven items rated 0–3; a score ≥ 10 had 89% sensitivity and 82% specificity for generalised anxiety disorder, with 5/10/15 marking mild, moderate, and severe anxiety.

Kroenke K, Spitzer RL, Williams JB, Monahan PO, Löwe B. Anxiety disorders in primary care: prevalence, impairment, comorbidity, and detection. The GAD-7 also performed well as a screen for panic disorder, social anxiety disorder, and PTSD at a threshold of ≥ 8–10.

Widely used for anxiety screening and treatment monitoring in primary care and psychiatry; free to use without permission (developed by Pfizer).