Patient Health Questionnaire (PHQ-9)

This easy to use patient questionnaire is a self-administered version of the PRIME-MD diagnostic instrument for common mental disorders.¹ The PHQ-9 is the depression module, which scores each of the 9 DSM-IV criteria as "0" (not at all) to "3" (nearly every day). It has been validated for use in Primary Care.²

PHQ9 is ©Pfizer.
May only be reprinted with permission, courtesy of Pfizer Limited."
PRIME-MD ® is a trademark of Pfizer.

1. Kroenke K, Spitzer RL, Williams JB; The PHQ-9: validity of a brief depression severity measure. J Gen Intern Med. 2001 Sep;16(9):606-13. [abstract]
2. Dietrich AJ, Oxman TE, Burns MR, et al; Application of a depression management office system in community practice: a demonstration. J Am Board Fam Pract. 2003 Mar-Apr;16(2):107-14. [abstract]
3. Pinto-Meza A, Serrano-Blanco A, Penarrubia MT, et al; Assessing depression in primary care with the PHQ-9: can it be carried out over the telephone? J Gen Intern Med. 2005 Aug;20(8):738-42. [abstract]