title: Incidence and diagnostic diversity in first-episode psychosis.
abstract: OBJECTIVE
  To investigate the incidence and range of diagnostic groups in patients with first-episode psychosis (FEP) in a defined geographical area.
  
  
  METHODS
  An observational database was set up on all patients aged 16 years and over presenting with FEP living in a county in Northern England between 1998 and 2005.
  
  
  RESULTS
  The incidence of all FEP was 30.95/100,000. The largest diagnostic groups were psychotic depression (19%) and acute and transient psychotic disorder (19%). Fifty-four per cent of patients were aged 36 years and over. Patients with schizophrenia spectrum disorder only accounted for 55% of cases.
  
  
  CONCLUSIONS
  This clinical database revealed marked diversity in age and diagnostic groups in FEP with implications for services and guidelines. These common presentations of psychoses are grossly under researched, and no treatment guidelines currently exist for them.
authors.affiliation: Northumberland, Tyne and Wear NHS Trust-PACE Office, St Georges Park, Morpeth, Northumberland, UK. robert.reay@ntw.nhs.uk
authors.forename: R
authors.initials: R
authors.lastname: Reay
authors.forename: E
authors.initials: E
authors.lastname: Mitford
authors.forename: K
authors.initials: K
authors.lastname: McCabe
authors.forename: R
authors.initials: R
authors.lastname: Paxton
authors.forename: D
authors.initials: D
authors.lastname: Turkington
mesh_terms: D000293:Adolescent; D000328:Adult; D000341:Affective Disorders, Psychotic / Q000175:diagnosis / Q000453:epidemiology*; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D004739:England; D005260:Female; D006801:Humans; D015994:Incidence; D038801:International Classification of Diseases; D008297:Male; D008605:Mental Health Services; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D011605:Psychoses, Substance-Induced / Q000175:diagnosis / Q000453:epidemiology*; D012559:Schizophrenia / Q000175:diagnosis / Q000453:epidemiology*; D055815:Young Adult