PHQ-9 (Patient Health Questionnaire-9): Items, Scoring, and Cut-Offs
If you have ever opened a thesis dataset and wondered what the PHQ-9 numbers actually mean, this guide is for you. PHQ-9 scoring interpretation is simpler than most students expect: nine questions, four answer options each, and one total score from 0 to 27 — plus five severity bands that tell you, at a glance, …