Psychometric comparison of the PHQ-9 and BDI-II for measuring response during treatment of depression.


The Patient Health Questionnaire-9 Item (PHQ-9) and Beck Depression Inventory-II (BDI-II) are frequently used measures of depression severity, but little is known about their relative psychometric properties. The authors assessed psychometric properties of both measures during treatment for depression. The PHQ-9 and BDI-II scores from 172 depressed… (More)
DOI: 10.1080/16506073.2010.550059