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December 12, 2024Frontiers in PsychiatryOpen Access

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

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Authors

SKSören KliemCSCedric SachserALAnna Lohmann

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Overview

Cross-sectional survey reveals sound psychometric validity and measurement invariance for the PHQ-9 in adults, highlighting updated population norms for depression screening.

Key Points

  • To evaluate the psychometric properties and factorial validity of the PHQ-9 and establish updated community norms across demographic groups in a representative general population sample.
  • Assessed a representative sample of German adults (response rate 42.6%) using the PHQ-9 alongside validation instruments including the GAD-7 and BSI-18.
  • Evaluated internal consistency using coefficient omega, factorial validity through confirmatory factor analysis of a one-factor model, and measurement invariance across gender, age, income, and education.
  • Demonstrated sound psychometric properties with robust internal consistency and construct validity through expected correlations with anxiety and somatization scores.
  • Confirmed measurement invariance across age and gender cohorts, providing stratified normative score distributions for clinical and epidemiological application.

Cite This Study

Kliem et al. (2024) studied this question.

synapsesocial.com/papers/6a7661ec656dd99464ec0053https://doi.org/10.3389/fpsyt.2024.1483782
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Also Consider

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