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A systematic review of longitudinal outcome studies of first-episode psychosis

  • N. M. MENEZES (a1), T. ARENOVICH (a1) and R. B. ZIPURSKY (a1)
  • DOI:
  • Published online: 01 June 2006

Background. Existing outcome literature has had an over-representation of chronic patients and suggested a progressive course and poor outcome for schizophrenia. The current study aimed to recombine data of samples from longitudinal studies of first-episode psychosis (FEP) to describe outcome and its predictors.

Method. A literature search (1966–2003) was conducted for prospective studies examining outcome in first-episode non-affective psychosis using the following key words: early, first, incident, episode, admission, contact, psychosis, schizophrenia, psychotic disorders, course, outcome, follow-up, longitudinal, cohort. These were pooled and analyzed using descriptive and regression analyses.

Results. Thirty-seven studies met the inclusion criteria, representing 4100 patients with a mean follow-up of 35·1±6·0 months. Studies varied in the categories of outcome used, the most common being ‘good’ (54% of studies) and ‘poor’ (34% of studies), variably defined. In studies reporting these categories, good outcomes were reported in 42·2% (3·5%) and poor outcomes in 27·1% (2·8%) of cases. Predictors associated with better outcome domains were: combination of pharmacotherapy and psychosocial therapy, lack of epidemiologic representativeness of the sample, and a developing country of origin. Use of typical neuroleptics was associated with worse outcome. Stratification analyses suggested that populations with schizophrenia only, and those with prospective design, were associated with worse outcome domains.

Conclusions. Outcome from FEP may be more favorable than previously reported, and treatment and methodological variables may be important contributors to outcome. Significant heterogeneity in definitions and methodology limited the comparison and pooling of data. A multi-dimensional, globally used definition of outcome is required for future research.

Corresponding author
250 College Street W, 7th Floor, Schizophrenia Program, Toronto, Ontario, M5T 1R8 Canada. (Email:
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Psychological Medicine
  • ISSN: 0033-2917
  • EISSN: 1469-8978
  • URL: /core/journals/psychological-medicine
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