Internal structure and factorial invariance of the Patient Health Questionnaire −9 (PHQ-9) in a large Argentinean sample

Key Points

• The PHQ-9 demonstrated strong factorial invariance across different demographics in the sample.
• Using confirmatory factor analysis, the study identified a reliable measurement model for depression screening.
• Assessment was conducted on a large sample from Argentina, ensuring diverse representation and generalizability.
• Findings support the use of the PHQ-9 as a valid tool for evaluating mental health in varied populations.