Evidence map›Paper›PMID 19949719›Full record

ReviewJournal of psychiatry & neuroscience : JPN2009

A translational research approach to poor treatment response in patients with schizophrenia: clozapine-antipsychotic polypharmacy.

William G Honer, Ric M Procyshyn, Eric Y H Chen, G William MacEwan, Alasdair M Barr

Abstract readReview
In one paragraph

Review in Journal of psychiatry & neuroscience : JPN, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Treatment of clozapine-associated weight gain: a systematic review.European journal of clinical pharmacology · 2015
    Pooled it
  2. Pooled it
  3. Article
  4. Correlates of high-dose antipsychotic prescription amongst outpatients with Schizophrenia in a Nigerian Hospital.The South African journal of psychiatry : SAJP : the journal of the Society of Psychiatrists of South Africa · 2022
    Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

William G HonerBC Mental Health and Addictions Research Institute, University of British Columbia, Vancouver, BC, Canada. honer@interchange.ubc.ca
Ric M Procyshyn
Eric Y H Chen
G William MacEwan
Alasdair M Barr

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Poor treatment response in patients with schizophrenia is an important clinical problem, and one possible strategy is concurrent treatment with more than one antipsychotic (polypharmacy). We analyzed the evidence base for this strategy using a translational research model focused on clozapine-antipsychotic polypharmacy (CAP). We considered 3 aspects of the existing knowledge base and translational research: the link between basic science and clinical studies of efficacy, the evidence for effectiveness in clinical research and the implications of research for the health care delivery system. Although a rationale for CAP can be developed from receptor pharmacology, there is little available preclinical research testing these concepts in animal models. Randomized clinical trials of CAP show minimal or no benefit for overall severity of symptoms. Most studies at the level of health services are limited to estimates of CAP prevalence and some suggestion of increased costs. Increasing use of antipsychotic polypharmacy in general may be a factor contributing to the under-utilization of clozapine and long delays in initiating clozapine monotherapy. Translational research models can be applied to clinical questions such as the value of CAP. Better linkage between the components of translational research may improve the appropriate use of medications such as clozapine in psychiatric practice.

Indexed as

Antipsychotic AgentsClinical Trials as TopicClozapineDrug Therapy, CombinationHumansPolypharmacyReflex, StartleSchizophreniaSchizophrenic PsychologyTreatment FailureTreatment OutcomeAntipsychotic AgentsClozapine

Identifiers

PMID19949719
PMCPMC2783434

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.