Chapter 1 Introduction: Relevance of the Age of Onset of Mental Disorders to Research in Psychiatry and to the Organization of Services for People with Mental Illness

Chapter 2 Lessons from Knowledge on the Correlates of the Age of Onset of Physical Illness

Chapter 4 The Age of Onset of Schizophrenia Spectrum Disorders

Chapter 5 The Age of Onset of Bipolar Disorders

Chapter 6 The Age of Onset of Unipolar Depression

Chapter 7 The Age of Onset of Anxiety Disorders

Chapter 8 The Age of Onset of Substance Use Disorders

Chapter 9 The Age of Onset of Alcohol Use Disorders

Chapter 10 The Age of Onset of Personality Disorders

Chapter 11 The Age of Onset of Eating Disorders

Chapter 12 The Age of Onset of Attention-Deficit Hyperactivity Disorder

Chapter 13 The Age of Onset of Dementias

Chapter 14 Conclusions: From the Study of the Age of Onset to the Development of Age-Specific Interventions in Mental Health