Psychometric evaluation and community norms of the PHQ-9, based on a representative German sample.

ABSTRACT:

Background

The Patient Health Questionnaire (PHQ-9) is a popular tool for assessing depressive symptoms in both general and clinical populations. The present study used a large representative sample of the German adult population to confirm desired psychometric functioning and to provide updated population norms.

Methods

The following psychometric properties were assessed: (i) Item characteristics (item means, standard deviations and inter-item correlations), (ii) Construct validity (correlations of the PHQ-9 sum-score with scores obtained from instruments assessing depression, anxiety and somatization (GAD-7, BSI-18), (iii) Internal consistency (coefficient omega), (iv) Factorial validity (via confirmatory factor analysis of the assumed one factorial model) as well as (v) M

SUBMITTER: Kliem S 

PROVIDER: S-EPMC11670475 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature