A systematic review of long-term outcomes of patients with psychosis who received early intervention services

Sherry K.W. Chan, Hei Y.V. Chan, Jillian Devlin, Tarun Bastiampillai, Titus Mohan, Christy L.M. Hui, Wing C. Chang, Edwin H.M. Lee, Eric Y.H. Chen

Research output: Contribution to journalReview articlepeer-review

23 Citations (Scopus)


Despite convincing evidence of short-term symptom control and functional recovery of patients with psychosis after receiving early intervention (EI) services, little is known about the long-term outcomes of EI for these patients. This review aims to evaluate the effectiveness of EI services in improving long-term outcomes of patients with psychosis. A systematic literature search was conducted on PubMed, PsycINFO, Scopus, Medline, CINAHL, BIOSIS, and EMBASE electronic databases to identify studies that evaluated long-term outcomes of patients with psychosis measured 5 years or beyond after entering the EI service. Of 13,005 articles returned from the search, 14 eligible articles reporting study cohorts from nine EI services in seven countries and regions were identified. Data on study design, patient characteristics, intervention components, and outcomes were extracted and reviewed. Only a few studies reported better longitudinal outcomes for negative symptoms, mortality, employment, and hospitalization in patients received EI services. However, results from cross-sectional measurements provided little evidence for long-term impacts of EI services on clinical and functional outcomes. A dilution effect of benefits over time was also demonstrated in several studies. This review highlights the gap in current EI service provision and suggests possible future directions for service improvement and further research.

Original languageEnglish
Pages (from-to)425-440
Number of pages16
JournalInternational Review of Psychiatry
Issue number5-6
Publication statusPublished - 29 Jul 2019


  • Early intervention
  • long-term outcomes
  • outcome studies
  • psychosis
  • schizophrenia


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