title: Comorbidity of schizophrenia and adult attention-deficit hyperactivity disorder.
abstract: OBJECTIVE
  Adult ADHD is characterised by a plethora of comorbid conditions. However, the comorbidity of schizophrenia and ADHD does not seem to be a typical feature and is therefore under-researched.
  
  
  OBJECTIVE
  To identify adult patients with schizophrenia and comorbid ADHD and compare their symptomatology with schizophrenic patients without ADHD.
  
  
  METHODS
  Performance in specific neuropsychological tests (set shifting, selective and sustained attention, cognitive performance, and speed of information processing) was determined. Additionally, important demographic data and information about the patients' history such as the number of suicide attempts were gathered. Twenty-seven patients were involved in this study (14 male and 13 female). Fifteen patients were diagnosed with schizophrenia/no ADHD and twelve had both schizophrenia/ADHD.
  
  
  RESULTS
  We report here an increase in suicidal behaviour of patients with both schizophrenia and ADHD compared to schizophrenia only. A significant underperformance of the patients with ADHD comorbidity compared to patients with schizophrenia only was also determined.
  
  
  CONCLUSIONS
  The increased suicidal behaviour in patients with schizophrenia and ADHD suggests the need of further studies on mood regulation and suicidal ideations in these patients.
authors: Academic Unit of Psychiatry, College of Medicine, Swansea University, Swansea, UK.
authors: Rossen
authors: R
authors: Donev
authors: Daniel
authors: D
authors: Gantert
authors: Khaled
authors: K
authors: Alawam
authors: Ann
authors: A
authors: Edworthy
authors: Frank
authors: F
authors: Hässler
authors: Andreas
authors: A
authors: Meyer-Lindenberg
authors: Harald
authors: H
authors: Dressing
authors: Johannes
authors: J
authors: Thome
mesh_terms: D000293:Adolescent; D000328:Adult; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis / Q000453:epidemiology* / Q000523:psychology; D003072:Cognition Disorders / Q000175:diagnosis / Q000453:epidemiology; D015897:Comorbidity; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000706:statistics & numerical data; D011594:Psychometrics; D012559:Schizophrenia / Q000175:diagnosis / Q000453:epidemiology*; D012565:Schizophrenic Psychology; D059020:Suicidal Ideation; D013406:Suicide, Attempted / Q000523:psychology / Q000706:statistics & numerical data; D055815:Young Adult