Clarify your depression symptoms with our PHQ-9 questionnaire

There are a number of different depression questionnaires that can be used. The PHQ-9 patient questionnaire is effective, as it not only evaluates the severity of depression, but also identifies whether a patient is actually suffering from depression in the first place.

Other popular questionnaires such as e.g. the Beck Depression Inventory (BDI) or the Quick Inventory for Depressive Symptomatology (QIDS), on the other hand, only evaluate the severity of depression and/or take more time to complete. In addition, despite the very short processing time, the PHQ-9 provides enormously reliable results.

The questions asked by the PHQ-9 are all based on the official criteria for major depression according to the DSM-IV – the standard reference for the classification of mental illnesses.