Prevalence, diagnosing and classifying

• Prevalence


  • 1% - among the most common mental disorders
  • Higher prevalence in males, inner-city areas and lower socio-economic backgrounds
• Diagnosing and classifying


  • DSM-5 - American, one positive symptom
  • ICD-11 - World Health Organisation, two or more negative symptoms
• Volumes


  • The DSM-5 and ICD-11 are constantly being updated as new information is being discovered and societal norms are changing
  • E.g. homosexuality used to be in the DSM