The Patient Health Questionnaire 9-item depression module (PHQ-9) is a well-validated, brief, self-reported, diagnostic, and severity measure of depression designed for use in primary care (PC).

phenotypic and symptom factors that could predict the PHQ-9 score (logarithm of PHQ-9 +1). Data were randomly split into a training set (approximately 70% of the data), which was used to build the ...

This R script analyzes patient engagement data, focusing on PHQ-9 scores (a measure of depression severity) across different types of patient contact. The analysis includes statistical tests, ...

As a patient, I would like to take the PHQ-9 depression screener and get the assessment score along with its explanation. As a patient, if I score moderate depression or higher, I would like to be ...