10.116. Patient Health Questionnaire 8-item depression scale (PHQ-8)¶
10.116.1. History and guide¶
The PHQ-8 is the PHQ-9 with the final question, about suicidal or self-injurious thoughts, omitted (Kroenke et al. 2009, p165). It was omitted for situations in which interviewers/data collectors are not able to provide adequate intervention (Kroenke et al. 2009, p165). However, the omitted question is “by far the least frequently endorsed” and the scoring is the same as for the PHQ-9 (Kroenke et al. 2009, p165). The final prompt, about daily functioning, is also omitted (Kroenke et al. 2009, p171).
A score of ≥10 is the standard cutoff for likely major depressive disorder (MDD); this is the same cutoff as the PHQ-9 (Kroenke et al. 2010). A score of ≥10 has an 88% sensitivity and 88% specificity for major depression (Kroenke & Spitzer 2002, via Kroenke et al. 2009).
Kroenke K, Spitzer RL (2002). The PHQ-9: a new depression and diagnostic severity measure. Psychiatric Annals 32: 509–521. https://doi.org/10.3928/0048-5713-20020901-06
Kroenke K, Strine TW, Spitzer RL, Williams JBW, Berry JT, Mokdad AH (2009). The PHQ-8 as a Measure of Current Depression in the General Population. Journal of Affective Disorders 114: 163–73. https://pubmed.ncbi.nlm.nih.gov/18752852/; https://doi.org/10.1016/j.jad.2008.06.026.
Kroenke K, Spitzer RL, Williams JBW, Löwe B (2010). The Patient Health Questionnaire Somatic, Anxiety, and Depressive Symptom Scales: a systematic review. Gen Hosp Psychiatry 32: 345-59. https://pubmed.ncbi.nlm.nih.gov/20633738/
See PHQ-9, and Kroenke (2009) as above.
10.116.3. Intellectual property rights¶
Public domain. See PHQ-9.