Title: Subclinical psychosis syndromes in the general population: results from a large-scale epidemiological survey among residents of the canton of Zurich, Switzerland
Authors : Rössler, W.
Ajdacic-Gross, V.
Haker, H.
Rodgers, S.
Müller, M.
Hengartner, Michael Pascal
Published in : Epidemiology and Psychiatric Sciences
Volume(Issue) : 24
Issue : 1
Pages : 69
Pages to: 77
Publisher / Ed. Institution : Cambridge University Press
Issue Date: 2013
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Subclinical psychosis
Subject (DDC) : 616.89: Mental disorders, clinical psychology and psychiatry
Abstract: Aims: Prevalence and covariates of subclinical psychosis have gained increased interest in the context of early identification and treatment of persons at risk for psychosis. Methods: We analysed 9829 adults representative of the general population within the canton of Zurich, Switzerland. Two psychosis syndromes, derived from the SCL-90-R, were applied: ‘schizotypal signs’ and ‘schizophrenia nuclear symptoms’. Results: Only a few subjects (13.2%) reported no schizotypal signs. While 33.2% of subjects indicated mild signs, only a small proportion (3.7%) reported severe signs. A very common outcome was no ‘schizophrenia nuclear symptoms’ (70.6%). Although 13.5% of the participants reported mild symptoms, severe nuclear symptoms were very rare (0.5%). Because these two syndromes were only moderately correlated (r = 0.43), we were able to establish sufficiently distinct symptom clusters. Schizotypal signs were more closely connected to distress than was schizophrenia nuclear symptoms, even though their distribution types were similar. Both syndromes were associated with several covariates, such as alcohol and tobacco use, being unmarried, low education level, psychopathological distress and low subjective well-being. Conclusions: Subclinical psychosis symptoms are quite frequent in the general population but, for the most part, are not very pronounced. In particular, our data support the notion of a continuous Wald distribution of psychotic symptoms in the general population. Our findings have enabled us to confirm the usefulness of these syndromes as previously assessed in other independent community samples. Both can appropriately be associated with well-known risk factors of schizophrenia.
Departement: Applied Psychology
Organisational Unit: Psychological Institute (PI)
Publication type: Article in scientific Journal
DOI : 10.1017/S2045796013000681
ISSN: 2045-7960
URI: https://digitalcollection.zhaw.ch/handle/11475/15123
Appears in Collections:Publikationen Angewandte Psychologie

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