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PHQ-9 (Patient Health Questionnaire – 9 items)

Created in 2001 and now a very dominant self-report questionnaire. One of the mandatory measures in IAPT (or now “NHS talking therapies, for anxiety and depression programme”).

Details #

A nine item questionnaire which asks about the last two weeks (yes, it is two weeks). The nine items cover the DSM-IV (yes, DSM-IV not DSM-5) criteria for “major depressive disorder” (MDD) each answered on a four level frequency rating:
0 = Not at all
1 = Several days
2 = More than half the days
3 = Nearly every day.

As you can see, it’s a very “illness model” and diagnosis framed measure. The PHQ-8 is a short version that omits the risk to self item.

Try also #

  • Depression
  • Diagnosis
  • DSM
  • PHQ-8

Chapters #

Mentioned in Chapter 4.

Online resources #

None current or likely I suspect.

Dates #

First created 7.ii.25.

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