Acta psychiatrica Scandinavica
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Acta Psychiatr Scand · May 2010
The Stockholm non-affective psychoses study (snaps): the importance of including out-patient data in incidence studies.
To estimate the incidence rate of schizophrenia and non-affective psychoses from registers, to highlight the importance of including data from out-patient care, and to assess the proportion of persons treated in out-patient care only. ⋯ There are substantial differences in the incidence rates of non-affective psychoses and schizophrenia depending on the availability of data. Not including out-patient care will underestimate the incidence rates.