Longitudinal measurement invariance of the Patient Health Questionnaire-9 across racial/ethnic groups: Results from the traumatic brain injury model system study.

Rehabilitation Psychology, Vol 70(1), Feb 2025, 26-35; doi:10.1037/rep0000543Purpose/Objective: The aim of this article is to evaluate the measurement invariance (MI) of the Patient Health Questionnaire-9 (PHQ-9) in a sample of individuals during the first 2 years...