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Ketalux - Ketamine Therapy Education
Glossary

PHQ-9

A widely used self-report depression screening tool.

Medically reviewed by: Pending medical review(draft)Last updated: June 4, 2026Evidence: Educational definition

The Patient Health Questionnaire-9 is a nine-item screen for depression severity. It is not a diagnostic tool but is widely used to track symptoms over time.

Related terms

  • GAD-7 — A widely used self-report anxiety screening tool.

Definitions are educational and general. They are not medical advice.

Educational use only. The content on this page is provided for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Ketamine and related therapies carry risks and are appropriate only under qualified medical supervision. Always consult a licensed healthcare professional about your individual situation. Information may change as research evolves.