title: Baseline profiles of adolescent vs. adult-onset first-episode psychosis in an early detection program.
abstract: OBJECTIVE
  Psychotic disorders often start in adolescence. We aim to investigate premorbid and baseline differences characterizing patients with an onset of psychosis in adolescence versus adulthood.
  
  
  METHODS
  We compare first-episode, DSM-IV non-affective psychosis with onset before (n = 43) and after (n = 189) 18 years on duration of untreated psychosis (DUP), level of symptoms, suicidal behaviour, and other baseline clinical and demographic characteristics.
  
  
  RESULTS
  Adolescent onset patients had poorer premorbid functioning, a longer DUP, higher suicidality, and more depressive symptoms. They also had better cognition, fewer psychotic symptoms, and were more likely to be treated on an out-patient basis.
  
  
  CONCLUSIONS
  Adolescents with first-episode psychosis may have a slower and more silent, i.e. insidious onset, and are at risk of experiencing longer treatment delays than adults. They fit the description of what used to be labeled process (versus reactive) schizophrenia.
authors.affiliation: Psychiatric Division, Regional Centre for Clinical Research in Psychosis, Stavanger University Hospital, Stavanger, Norway. ijo@sus.no
authors.forename: I
authors.initials: I
authors.lastname: Joa
authors.forename: J O
authors.initials: JO
authors.lastname: Johannessen
authors.forename: J
authors.initials: J
authors.lastname: Langeveld
authors.forename: S
authors.initials: S
authors.lastname: Friis
authors.forename: I
authors.initials: I
authors.lastname: Melle
authors.forename: S
authors.initials: S
authors.lastname: Opjordsmoen
authors.forename: E
authors.initials: E
authors.lastname: Simonsen
authors.forename: P
authors.initials: P
authors.lastname: Vaglum
authors.forename: T
authors.initials: T
authors.lastname: McGlashan
authors.forename: T K
authors.initials: TK
authors.lastname: Larsen
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology; D000328:Adult; D017668:Age of Onset; D039721:Diagnostic and Statistical Manual of Mental Disorders; D042241:Early Diagnosis; D005260:Female; D006801:Humans; D008297:Male; D011379:Prognosis; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000175:diagnosis*; D012307:Risk Factors; D012559:Schizophrenia / Q000175:diagnosis*; D012565:Schizophrenic Psychology; D013405:Suicide / Q000523:psychology; D013997:Time Factors