Generalised Anxiety Disorder Assessment (GAD-7)
The GAD-7 is a brief measure of symptoms of anxiety, based on the generalised anxiety disorder diagnostic criteria described in DSM-IV. This assessment asks patients to evaluate their level of symptoms over the last two weeks, and can be used to track treatment progress over time. Given the simple language used in the assessment it is appropriate for individuals as young as 14 years. When used as a screening tool, further evaluation is recommended when the score is 10 or greater. Using the threshold score of 10, the GAD-7 has a sensitivity of 89% and a specificity of 82% for generalised anxiety disorder. It is moderately good at screening three other common anxiety disorders – panic disorder (sensitivity 74%, specificity 81%), social anxiety disorder (sensitivity 72%, specificity 80%), and post-traumatic stress disorder (sensitivity 66%, specificity 81%) (Kroenke, et al. 2007).