Patient Health Questionnaire Anxiety and Depression Scale: Initial Validation in Three Clinical Trials.

ABSTRACT:

Objective

We examine the reliability and validity of the Patient Health Questionnaire Anxiety and Depression Scale (PHQ-ADS)-which combines the nine-item Patient Health Questionnaire depression scale and seven-item Generalized Anxiety Disorder scale-as a composite measure of depression and anxiety.

Methods

Baseline data from 896 patients enrolled in two primary-care based trials of chronic pain and one oncology-practice-based trial of depression and pain were analyzed. The internal reliability, standard error of measurement, and convergent, construct, and factor structure validity, as well as sensitivity to change of the PHQ-ADS were examined.

Results

The PHQ-ADS demonstrated high internal reliability (Cronbach α values of .8 to .9) in all three trials. PHQ-ADS scores

SUBMITTER: Kroenke K 

PROVIDER: S-EPMC4927366 | biostudies-literature | 2016 Jul-Aug

REPOSITORIES: biostudies-literature