Clinical Utility of the Patient Health Questionnaire-9 in the Assessment of Major Depression After Broad-Spectrum Traumatic Brain Injury

The PHQ-9 has adequate clinical utility as a screening instrument for depression in outpatients with traumatic brain injury. Elevations on this instrument cannot, however, be automatically attributed to neuropathology, especially not in the context of premorbid psychiatric dysfunction. Clinicians should conduct more thorough follow-up assessment in those with highly elevated PHQ-9 scores.