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The article you requested is

Generalizability of the Results of Efficacy Trials in First-Episode Schizophrenia: Comparisons Between Subgroups of Participants of the European First Episode Schizophrenia Trial (EUFEST)

J Clin Psychiatry 2010;71(1):58-65
10.4088/JCP.08m04506yel
Copyright 2009 Physicians Postgraduate Press, Inc.

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| 54.196.131.132

Objective: Most randomized drug trials in schizophrenia exclude patients with comorbidities such as suicidality or substance use, which may limit the generalizability of the results. We aimed to evaluate the generalizability of the results of these trials in participants of a randomized clinical trial with broad inclusion criteria.

Method: In 50 sites in 14 countries, 498 patients with first-episode psychosis (DSM-IV schizophrenia, schizoaffective disorder, or schizophreniform disorder) were recruited between December 2002 and January 2006 in an open, randomized clinical drug trial with 12 months of follow-up. Baseline characteristics and follow-up data were compared between patients with versus patients without baseline suicidality and/or substance use.

Results: Of the 489 participants with data on baseline suicidality and substance use, 153 (31%) patients were suicidal and/or using substances. Groups differed on only a few of the many baseline characteristics tested: comorbid patients were younger (25.1 vs 26.5 years of age; P<.01), less often female (25% vs 47%; P<.001) or married (4% vs 17%; P<.001), had fewer years of education (11.8 vs 12.8; P<.001), and experienced lower levels of overall psychosocial functioning (Global Assessment of Functioning; 38.4 vs 40.8; P.05) and higher levels of depression (Calgary Depression Scale for Schizophrenia; 6.1 vs 4.6; P<.001). At follow-up, comorbid patients showed shorter time to (re)hospitalization and reported higher levels of depression than patients without comorbidity (hazard ratio=2.02, P=.004; χ27=17.25, P=.016, respectively), without differences on other outcome measures.

Conclusions: Although it appears that the generalizability of antipsychotic treatment trials in first-episode patients is not seriously affected by the exclusion of patients with suicidal symptoms and/or substance use, researchers should be cautious about the exclusion of such patients.

Trial Registration: controlled-trials.com Identifier: ISRCTN68736636


Submitted: July 1, 2008; accepted Dec 1, 2008.

Online ahead of print: October 20, 2009

Corresponding author: Han Boter, PhD, Department of Epidemiology (room FA 40), University Medical Centre Groningen, PO Box 30001, NL-9700 RB Groningen, The Netherlands (H.Boter@epi.umcg.nl).