Unfortunately, Internet Explorer is an outdated browser and we do not currently support it. To have the best browsing experience, please upgrade to Microsoft Edge, Google Chrome or Safari.Upgrade Browser
The following nine questions are taken from a measure used by doctors known as the Personal Health Questionnaire or PHQ-9. These questions are used to assess and monitor depression severity. The PHQ-9 was developed by Drs Robert L Spitzer, Janet BW Williams, Kurt Kroenke and colleagues, with an educational grant from Pfizer Inc.