This fourth edition of Fast Facts: Depression has been updated using the DSM-5 diagnostic criteria and the latest recommendations from research reviews and clinical practice guidelines, and includes a new chapter on depression in women. It provides practical guidance on the assessment and management of depression from the biopsychosocial and lifestyle perspectives, at both individual and organizational levels. It will help busy health professionals working in a range of settings to\ndistinguish depression from ordinary sadness and to provide appropriate evidence-based interventions.