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Our aim was to deconstruct the variance underlying the expression of sub-clinical psychosis symptoms into portions associated with latent time-dependent states and time-invariant traits.We analyzed data of 335 subjects from the general population of Zurich, Switzerland, who had been repeatedly measured between 1979 (age 20/21) and 2008 (age 49/50). We applied two measures of sub-clinical psychosis...
Aims The aim of the study was to examine the temporal associations between substance use and subclinical psychosis symptoms.
Design Data from a prospective community study sampled within a single cohort over 30 years (1978–2008) were analysed with discrete‐time hazard models.
Setting General population‐based sample.
Participants At initial sampling in 1978 males (n = 292) were 19 and females (...
There is controversy over whether the incidence rates of schizophrenia and psychotic disorders have changed in recent decades. To detect deviations from trends in incidence, we analysed admission data of patients with an ICD-8/9/10 diagnosis of psychotic disorders in the Canton Zurich / Switzerland, for the period 1977–2005. The data was derived from the central psychiatric register of the Canton...
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