First-episode non-affective psychosis in a total urban population: a 5-year follow-up.

Background: The aim of this study is to investigate incidence rates, treatment, and outcome of a total in- and outpatient population of 71 patients (of 18-45 years of age) treated for a first-episode psychosis (DSM-IV) in three catchment areas in Stockholm.

Methods: The study is based on the investigation of records and databases and on information by staff members and patients.

Results: The incidence rate was 34.