Evidence map›Paper›PMID 17415081›Full record

ReviewCurrent opinion in psychiatry2007

Cognitive heterogeneity in schizophrenia.

Eileen M Joyce, Jonathan P Roiser

Abstract readReview
In one paragraph

Review in Current opinion in psychiatry, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed, 4 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

78 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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18 more citing papers are in PubMed but not listed here.

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

2 authors.

Eileen M JoyceUCL Institute of Neurology, London, UK. e.joyce@ion.ucl.ac.uk
Jonathan P Roiser

Funding

Wellcome Trust 064607
6 · The paper itself

Abstract

purposeFurther clarification of the nature of cognitive heterogeneity in schizophrenia is needed to aid the endophenotype approach to the understanding of the genetic basis of the disorder. This review summarizes recent neuropsychological studies of schizophrenia, aimed at establishing whether there are valid forms of cognitive impairment that can be defined with the use of neuropsychological measures in patients with schizophrenia, and studies that have attempted to relate specific neuropsychological findings to genetic polymorphisms. RECENT

findingsThere is good evidence for significant cognitive heterogeneity in schizophrenia. It is not yet clear, however, whether this heterogeneity is better accounted for by a general loss of function, varying in degree between different patients, or by impairment in specific cognitive abilities, for example working memory. Molecular genetic studies have provided evidence for associations of single nucleotide polymorphisms with both specific and general impairments, with some additional support for a working memory deficit from neuroimaging studies. SUMMARY: Larger, better controlled studies are needed before the genetic sources of cognitive heterogeneity in schizophrenia can be accurately characterized. This will be aided with the development and use of more specific neuropsychological tasks that can accurately discriminate between different cognitive domains.

Indexed as

Neuropsychological TestsSchizophrenic PsychologyCarrier ProteinsCatechol O-MethyltransferaseCognition DisordersDominance, CerebralDysbindinDystrophin-Associated ProteinsHumansIntelligenceMagnetic Resonance ImagingMemory, Short-TermPolymorphism, Single NucleotidePrefrontal CortexSchizophreniaCarrier ProteinsCatechol O-MethyltransferaseDTNBP1 protein, humanDysbindinDystrophin-Associated Proteins

Identifiers

PMID17415081
PMCPMC2597188

What OpenQuestion holds

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Registered trials

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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.