The Generalized Anxiety Disorder (GAD) questionnaire (Spitzer et al., 2006) is a 7-item scale designed to measure generalised anxiety disorder. Different versions of the scale have been created which include a subset of the original 7 items.
Reference
Spitzer, R. L., Kroenke, K., Williams, J. B., & Löwe, B. (2006). A brief measure for assessing generalized anxiety disorder: the GAD-7. Archives of internal medicine, 166(10), 1092-1097. http://dx.doi.org/10.1001/archinte.166.10.1092
List of questions
| Question number | Question | Original 7-item version | GAD-21 |
| 1 | Over the last 2 weeks, how often have you been bothered by the following problems? Feeling nervous, anxious, or on edge | ✓ | ✓ |
| 2 | Over the last 2 weeks, how often have you been bothered by the following problems? Not being able to stop or control worrying | ✓ | ✓ |
| 3 | Over the last 2 weeks, how often have you been bothered by the following problems? Worrying too much about different things | ✓ | |
| 4 | Over the last 2 weeks, how often have you been bothered by the following problems? Having trouble relaxing | ✓ | |
| 5 | Over the last 2 weeks, how often have you been bothered by the following problems? Being so restless that it is hard to sit still | ✓ | |
| 6 | Over the last 2 weeks, how often have you been bothered by the following problems? Becoming easily annoyed or irritable | ✓ | |
| 7 | Over the last 2 weeks, how often have you been bothered by the following problems? Feeling afraid as if something awful might happen | ✓ |
1Kroenke, K., Spitzer, R. L., Williams, J. B., Monahan, P. O., & Löwe, B. (2007). Anxiety disorders in primary care: prevalence, impairment, comorbidity, and detection. Annals of Internal Medicine, 146(5), 317-25. https://doi.org/10.7326/0003-4819-146-5-200703060-00004