title: Differential results between self-report and interview-based ratings of risk symptoms of psychosis.
abstract: OBJECTIVE
  Assessing potential risk of developing psychosis has gained growing attention in recent literature. The selection of suitable assessment methods is the central question for this research endeavour. Whereas prodromal detection instruments are mostly interview-based instruments, there are short screening instruments for self-report use.
  
  
  METHODS
  Difference in psychosis risk scores was tested between self-report results and interview results, with risk symptoms of psychosis included in PROD screening instrument. Subjects were recruited by an early intervention team in Finland.
  
  
  RESULTS
  There was a significant difference between psychosis risk scores based on self-report versus interview in a sample of adolescents (n=87; P<0.001).
  
  
  CONCLUSIONS
  Results suggest that when using screening instruments, risk scores and risk status may vary by the method the information is collected. Checking self-report results by an additional interview is recommended for both clinical and scientific uses.
authors.affiliation: Department of Psychiatry, Helsinki University Central Hospital, Helsinki Department of Psychiatry, University of Turku, Turku, Finland. niklas.grano@hus.fi
authors.forename: Niklas
authors.initials: N
authors.lastname: Granö
authors.forename: Marjaana
authors.initials: M
authors.lastname: Karjalainen
authors.forename: Arja
authors.initials: A
authors.lastname: Itkonen
authors.forename: Jukka
authors.initials: J
authors.lastname: Anto
authors.forename: Virve
authors.initials: V
authors.lastname: Edlund
authors.forename: Markus
authors.initials: M
authors.lastname: Heinimaa
authors.forename: Mikko
authors.initials: M
authors.lastname: Roine
mesh_terms: D000293:Adolescent; D000328:Adult; D042241:Early Diagnosis; D005260:Female; D005387:Finland; D006801:Humans; D007406:Interview, Psychological; D008297:Male; D011237:Predictive Value of Tests; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics / Q000706:statistics & numerical data; D011618:Psychotic Disorders / Q000175:diagnosis* / Q000523:psychology; D018570:Risk Assessment; D012307:Risk Factors; D057566:Self Report; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires; D055815:Young Adult