Cut points on the Patient Health Questionnaire (PHQ-9) that predict response to cognitive-behavioral treatments for depression

Stephen M. Schueller*, Mary J. Kwasny, Blake F. Dear, Nickolai Titov, David C. Mohr

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Objective: Monitoring depressive symptoms during treatment can guide clinical decision making and improve outcomes. The aim of this study was to explore values on the Patient Health Questionnaire (PHQ-9) that could predict response to treatment. Method: Data came from two independent trials, including three treatment modalities of cognitive-behavioral treatment for depression. Four hundred eighty-seven participants who either met the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition criteria for major depressive disorder or had PHQ-9 scores consistent with a diagnosis of depression were included in our analyses. Participants either received 18 weeks of telephone or face-to-face (n = 279) or 8 weeks of Web-delivered (n = 208) cognitive-behavioral therapy. Depressive symptoms, evaluated using the PHQ-9, were reported every 4 weeks in the telephone and face-to-face trial and weekly in the Web-delivered intervention trial. Results: Optimal cut points for predicting end-of-treatment response were consistent in both trials. Our results suggested using cut points of a PHQ-9 ≥ 17 at Week 4, and PHQ-9 ≥ 13 at Week 9 and PHQ-9 ≥ 9 at Week 14. Conclusions: Consistent cut points were found within the included trials. These cut points may be valuable for algorithms to support clinical decision making.

    Original languageEnglish
    Pages (from-to)470-475
    Number of pages6
    JournalGeneral Hospital Psychiatry
    Volume37
    Issue number5
    DOIs
    Publication statusPublished - 1 Sep 2015

    Keywords

    • Depression
    • Cognitive-Behavioral therapy
    • Treatment
    • Computer/Internet technology
    • Measurement

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