Factor structure and measurement invariance across various demographic groups and over time for the PHQ-9 in primary care patients in Spain.

ABSTRACT: The Patient Health Questionnaire (PHQ-9) is a widely-used screening tool for depression in primary care settings. The purpose of the present study is to identify the factor structure of the PHQ-9 and to examine the measurement invariance of this instrument across different sociodemographic groups and over time in a sample of primary care patients in Spain. Data came from 836 primary care patients enrolled in a randomized controlled trial (PsicAP study) and a subsample of 218 patients who participated in a follow-up assessment at 3 months. Confirmatory factor analysis (CFA) was used to test one- and two-factor structures identified in previous studies. Analyses of multiple-group invariance were conducted to determine the extent to which the factor structure is comparable across various demo

SUBMITTER: Gonzalez-Blanch C 

PROVIDER: S-EPMC5825085 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature