The Patient Health Questionnaire–2 (PHQ-2) is part of the Stable Resource Toolkit. It includes the first two questions from the PHQ-9 and is used to quickly determine whether the more in-depth PHQ-9 screening tool should be administered. The self-report questions are ranked on a scale from 0 to 3 and ask individuals to respond based on their experiences for the two weeks prior to completing the screening tool.