Shortening self-report mental health symptom measures through optimal test assembly methods: Development and validation of the Patient Health Questionnaire-Depression-4.
Miyabi IshiharaDaphna HarelBrooke LevisAlexander W LevisKira E RiehmNazanin SaadatMarleine AzarDanielle B RiceTatiana A SanchezMatthew J ChiovittiPim CuijpersSimon GilbodyJohn P A IoannidisLorie A KlodaDean McMillanScott B PattenIan ShrierBruce ArrollCharles H BombardierPeter ButterworthGregory CarterKerrie CloverYeates ConwellFelicity Goodyear-SmithCatherine G GreenoJohn HambridgePatricia A HarrisonMarie HudsonNathalie JettéKim M KielyAnthony McGuireBrian W PenceAlasdair G RooneyAbbey SidebottomAdam SimningAlyna TurnerJennifer WhiteMary A WhooleyKirsty WinkleyAndrea BenedettiBrett D ThombsPublished in: Depression and anxiety (2018)
The PHQ-Dep-4 is a valid short form with minimal loss of information of scores when compared to the full-length PHQ-9. Although OTA methods have been used to shorten patient-reported outcome measures based on objective, prespecified criteria, further studies are required to validate this general procedure for broader use in health research. Furthermore, due to unexamined heterogeneity, there is a need to replicate the results of this study in different patient populations.