Evidence map›Paper›PMID 28966598›Full record

ArticleFrontiers in psychiatry2017

Verbal Memory Impairment in Patients with Subsyndromal Bipolar Disorder.

Tomiki Sumiyoshi, Atsuhito Toyomaki, Naoko Kawano, Tomoko Kitajima, Ichiro Kusumi, Norio Ozaki, Nakao Iwata, Kazuki Sueyoshi, Kazuyuki Nakagome

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Frontiers in psychiatry, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
1.5field-weighted citation impact, top 19% 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.

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

3 citing papers in PubMed, 13 citations in OpenAlex.

  1. Metacognitive knowledge and experience across multiple cognitive domains in euthymic bipolar disorder.European psychiatry : the journal of the Association of European Psychiatrists · 2021
    Article
  2. Review
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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

9 authors at 5 institutions in 1 country.

Tomiki SumiyoshiDepartment of Clinical Epidemiology, Translational Medical Center, National Center of Neurology and Psychiatry, Tokyo, Japan.
Atsuhito ToyomakiDepartment of Neuropsychiatry, Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
Naoko KawanoDepartment of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Tomoko KitajimaDepartment of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan.
Ichiro KusumiDepartment of Neuropsychiatry, Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
Norio OzakiDepartment of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Nakao IwataDepartment of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan.
Kazuki SueyoshiDepartment of Clinical Epidemiology, Translational Medical Center, National Center of Neurology and Psychiatry, Tokyo, Japan.
Kazuyuki NakagomeNational Institute of Health, National Center of Neurology and Psychiatry, Tokyo, Japan.
Fujita Health University · JPHokkaido University · JPNagoya University · JPNational Center of Neurology and Psychiatry · JPNational Institute of Infectious Diseases · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundsSeveral domains of cognitive function, including learning memory and executive function, are impaired in mood disorders. Also, the relationship between disturbances of these two cognitive domains has been suggested. In line with the recent initiative to establish a standard measure of cognitive decline in bipolar disorder, the present study was conducted to (1) test the criterion-related validity and test-retest reliability of the California Verbal Learning Test (CVLT)-II Japanese version, and (2) determine if type of word learning tasks (i.e., with or without a category structure) affects severity of verbal memory deficits in patients with subsyndromal bipolar disorder.

methodsThirty-six patients with bipolar disorder with mild symptoms and 42 healthy volunteers participated in the study. We first compared effect sizes for memory deficits in patients among the CVLT-II, Brief Assessment of Cognition in Schizophrenia (BACS), and Hopkins Verbal Memory Tests-Revised (HVLT-R). We next evaluated the correlations between scores of the CVLT-II vs. those of the BACS and HVLT-R. Bipolar patients were re-assessed with the same (standard) or alternate forms of the CVLT-II and HVLT-R 1 month later.

resultsScores on the CVLT-II 1-5 Free Recall and Long-delay Free Recall, as well as the HVLT-R Immediate Recall, but not the BACS List Learning were significantly lower for patients compared to control subjects. The effect sizes for cognitive decline due to the illness were comparable when measured by the CVLT-II and HVLT-R, ranging from 0.5 to 0.6. CVLT-II scores were significantly correlated with those of the HVLT-R and BACS. Test-retest reliability of the CVLT-II was acceptable, and no significant practice effect was observed when the alternate form was used. There was no consistent relationship between mood symptoms and performance on the CVLT-II.

conclusionThese results suggest the CVLT-II Japanese version is able to discriminate between bipolar disorder patients and healthy controls with good sensitivity and validity. Data in this study also indicate that the degree of verbal memory deficits in bipolar disorder may be influenced by memory organizational strategy.

Indexed as

bipolar disorderBrief Assessment of Cognition in SchizophreniaCalifornia Verbal Learning Test-IIHVLT-Rverbal learning

Identifiers

PMID28966598
PMCPMC5605624
OpenAlexW2753563664

What OpenQuestion holds

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LicenceCC BY
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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.