Assessing depression in cancer patients - a longitudinal comparison of three questionnaires

The article by Johns et al. (1) compares the Hopkins Symptom Checklist 20-item depression scale (HSCL-20) (2), the Short-Form 36 Mental Health Inventory five-item distress scale (MHI-5) (3), and the Patient Health Questionnaire nine-item depression scale (PHQ-9) (4) in 309 adults with cancer in a longitudinal study.