Psychotic features in the general population. Risk factors for what?

  • Lydia Krabbendam
  • Manon Hanssen
  • Maarten Bak
  • Jim Van Os


For clinical purposes, psychosis is defined as a discrete entity that can be identified by applying certain criteria. This does not mean, however, that this condition exists as such in nature. Disease at the level of the general population generally exists as a continuum of severity rather than an all-or-none phenomenon (Rose and Barker 1978). Evidence that variation in the psychosis phenotype can be better represented by the concept of a continuum comes from studies measuring psychotic symptoms in the general population (Claridge et al. 1996; Peters et al. 1999; Tien, 1991; Van Os et al. 1999, 200; Verdoux et al. 1998). These studies have found that the positive symptoms of psychosis are prevalent in the general population and show a similar pattern of correlation with each other as their equivalents do in clinical psychotic disorder.


Psychotic Symptom Psychotic Disorder Brief Psychiatric Rate Scale Psychotic Experience Brief Psychiatric Rate Scale Score 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Lydia Krabbendam
    • 1
  • Manon Hanssen
    • 1
  • Maarten Bak
    • 1
  • Jim Van Os
    • 1
    • 2
  1. 1.Dept. Psychiatry and Neuropsychology, European Graduate School of NeuroscienceMaastricht UniversityMaastrichtThe Netherlands
  2. 2.Division of Psychological MedicineInstitute of PsychiatryLondonUK

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