Evidence map›Paper›PMID 20724402›Full record

Trial reportBMJ (Clinical research ed.)2010

Maintenance treatment with quetiapine versus discontinuation after one year of treatment in patients with remitted first episode psychosis: randomised controlled trial.

Eric Y H Chen, Christy L M Hui, May M L Lam, Cindy P Y Chiu, C W Law, Dicky W S Chung, Steve Tso, Edwin P F Pang, K T Chan, Y C Wong and 5 more

2 registry-linked trialsOpen access · hybridAbstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in BMJ (Clinical research ed.), 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 51 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 8 pooled it
5.3field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT00334035 phase4completednot on this map

Duration of Maintenance Anti-psychotic Therapy After First -Episode Schizophrenia: a Double-blind Randomized Placebo-control Relapse Prevention Study

TypeinterventionalSponsorThe University of Hong KongRan2003 to 2007Enrolled169ConditionsSchizophreniaArmsQuetiapine
NCT07616999 recruitingnot on this mapstarted 2026, after this paper: background citation

Navigating the Longitudinal Effects of Early Treatment Strategies and Relapse on Clinical, Cognitive, and Functional Outcomes: A 20-Year Follow-up of First Episode Psychosis

Typeobservational_patient_registrySponsorThe University of Hong KongRan2026 to 2028Enrolled178ConditionsSchizophrenia
3 · Its place in the literature

Who cites it

51 citing papers in PubMed, 8 syntheses or guidelines pooled it, 154 citations in OpenAlex.

  1. Pooled it
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  5. Maintenance treatment with antipsychotic drugs for schizophrenia.The Cochrane database of systematic reviews · 2020
    Pooled it
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  8. Acetylcholinesterase inhibitors for schizophrenia.The Cochrane database of systematic reviews · 2012
    Pooled it
  9. Trial
  10. Trial
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  12. Factors Affecting Continuation of Aripiprazole Long-acting Injection in the Real World.Clinical psychopharmacology and neuroscience : the official scientific journal of the Korean College of Neuropsychopharmacology · 2025
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  14. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors at 6 institutions in 3 countries.

Eric Y H ChenDepartment of Psychiatry, University of Hong Kong, Hong Kong. eyhchen@hku.hk
Christy L M Hui
May M L Lam
Cindy P Y Chiu
C W Law
Dicky W S Chung
Steve Tso
Edwin P F Pang
K T Chan
Y C Wong
Flora Y M Mo
Kathy P M Chan
T J Yao
S F Hung
William G Honer
Tai Po Hospital · CNUniversity of Hong Kong · HKCastle Peak Hospital · CNQueen Mary Hospital · CNKwai Chung Hospital · CNUniversity of British Columbia · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo study rates of relapse in remitted patients with first episode psychosis who either continued or discontinued antipsychotic drugs after at least one year of maintenance treatment.

design12 month randomised, double blind, placebo controlled trial.

settingEarly psychosis outpatient clinics in Hong Kong.

participants178 patients with first episode psychosis who had received at least one year of antipsychotic drug treatment between September 2003 and July 2006 and had no positive symptoms of psychosis.

interventionsPatients received either maintenance treatment with quetiapine (400 mg/day) or placebo and were followed up for the next 12 months or until a relapse occurred.

main outcome measureRelapse assessed monthly and defined as re-emergence of psychotic symptoms (delusions, conceptual disorganisation, hallucinations, suspiciousness, and unusual thought content) according to predefined thresholds.

results178 patients were randomised (89 to quetiapine and 89 to placebo). The Kaplan-Meier estimate of the risk of relapse at 12 months was 41% (95% confidence interval 29% to 53%) for the quetiapine group and 79% (68% to 90%) for the placebo group (P<0.001). Although quetiapine was generally well tolerated, the rate of discontinuation due to adverse or serious adverse events was greater in the quetiapine group (18%; 16/89) than in the placebo group (8%; 7/89) (relative risk 2.29, 95% confidence interval 0.99 to 5.28; chi(2)=3.20, df=1; P=0.07).

conclusionIn a group of asymptomatic patients with first episode psychosis and at least one year of previous antipsychotic drug treatment, maintenance treatment with quetiapine compared with placebo resulted in a substantially lower rate of relapse during the following year. Trial registration Clinical trials NCT00334035.

Indexed as

Antipsychotic AgentsDibenzothiazepinesDouble-Blind MethodFemaleHumansMalePsychotic DisordersQuetiapine FumarateRecurrenceTime FactorsTreatment OutcomeAntipsychotic AgentsDibenzothiazepinesQuetiapine Fumarate

Identifiers

PMID20724402
PMCPMC2924475
OpenAlexW2006350866

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.