Patient Health Questionnaire (PHQ-9)

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Patient Health Questionnaire (PHQ-9 )

A questionnaire with 9 4-point Likert questions measuring depression by Kroenke et al (2001).
Duration: 1 minutes
(Requires Inquisit Lab)
(Run with Inquisit Web)
Last Updated
Mar 13, 2024, 4:13PM


Google ScholarSearch Google Scholar for peer-reviewed, published research using the Inquisit Patient Health Questionnaire (PHQ-9).

Kroenke, K., Spitzer, R. L., & Williams, J. B. W. (2001). The PHQ-9 - Validity of a brief depression severity measure. Journal of General Internal Medicine, 16, 606-613.

Sjonnesen, Kirsten, Berzins, Sandy, Fiest, Kirsten M, Bulloch, Andrew G. M, Metz, Luanne M, Thombs, Brett D, & Patten, Scott B. (2012). Evaluation of the 9-Item Patient Health Questionnaire (PHQ-9) as an Assessment Instrument for Symptoms of Depression in Patients with Multiple Sclerosis. Postgraduate Medicine, 124(5), 69-77.

Schueller, Stephen M., Kwasny, Mary J., ScD, Dear, Blake F., Titov, Nickolai, & Mohr, David C. (2015). Cut points on the Patient Health Questionnaire (PHQ-9) that predict response to cognitive–behavioral treatments for depression. General Hospital Psychiatry, 37(5), 470-475.

Hartung, Tim J, Friedrich, Michael, Johansen, Christoffer, Wittchen, Hans‐Ulrich, Faller, Herman, Koch, Uwe, . . . Mehnert, Anja. (2017). The Hospital Anxiety and Depression Scale (HADS) and the 9‐item Patient Health Questionnaire (PHQ‐9) as screening instruments for depression in patients with cancer. Cancer, 123(21), 4236-4243.

Tuck, Andrew N, Scribani, Melissa B, Grainger, Scott D, Johns, Celeste A, & Knight, Reginald Q. (2018). The 9-Item Patient Health Questionnaire (PHQ-9): An aid to assessment of patient-reported functional outcomes after spinal surgery. The Spine Journal, 18(8), 1398-1405.

Sen, S, Mullanfiroze, K, Tulpule, S, Gupta, S, & Sen, S. (2019). G539(P) Screening for depression among parents of patients with thalassemia using patient health questionnaire (phq-9). Archives of Disease in Childhood, 104(Suppl 2), A218.

Ford, Joseph, Thomas, Felicity, Byng, Richard, & McCabe, Rose. (2020). Use of the Patient Health Questionnaire (PHQ-9) in Practice: Interactions between patients and physicians. Qualitative Health Research, 30(13), 2146-2159.