Swiss researchers, analyzing data from a prospective study. found a continuity of sub-clinical psychosis in the general population, with only a small proportion that suffered from distressing symptoms.  The researchers found that the syndromes identified were similar to those found in schizophrenia diagnoses. Results appeared online in European Psychiatry.

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Rossler, W., Hengartner, M., Ajdacic-Cross, V., Haker, H., Angst, J., Lifetime and 12-month prevalence rates of sub-clinical psychosis symptoms in a community cohort of 50-year-old individuals. European Psychiatry, ePub September 15, 2012