You will often hear PHQ9 GAD7 mentioned together. That’s because the GAD-7 and PHQ-9 were developed by the same group and were funded by an education grant from Pfizer, Inc. The GAD screens for anxiety and the PHQ 9 screening tool screens for depression. Both PHQ9 and GAD7 scoring is done in a similar way and is based on how often an individual experiences certain symptoms/problems.