Evidence map›Paper›PMID 21554945›Full record

ArticleBrain, behavior, and immunity2011

Brain derived neurotrophic factor, cardiopulmonary fitness and cognition in patients with coronary artery disease.

W Swardfager, N Herrmann, S Marzolini, M Saleem, P Shammi, P I Oh, P R Albert, M Daigle, A Kiss, K L Lanctôt

Abstract read
In one paragraph

Article in Brain, behavior, and immunity, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing 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

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

  1. Pooled it
  2. Genetics of serum BDNF: meta-analysis of the Val66Met and genome-wide association study.The world journal of biological psychiatry : the official journal of the World Federation of Societies of Biological Psychiatry · 2013
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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

10 authors.

W SwardfagerNeuropsychopharmacology Research Group, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
N Herrmann
S Marzolini
M Saleem
P Shammi
P I Oh
P R Albert
M Daigle
A Kiss
K L Lanctôt

Funding

CIHR 115098-1CIHR 36437-3
6 · The paper itself

Abstract

objectiveTo assess serum brain derived neurotrophic factor (BDNF) concentrations as a correlate of cardiopulmonary fitness and as a predictor of cognitive performance in subjects with coronary artery disease (CAD).

methodsSerum BDNF concentrations were assayed by ELISA and fitness was assessed using a standardized exercise stress test. The Mini Mental Status Examination (MMSE), California Verbal Learning Test 2nd Ed., Stroop, Trail Making Test B and the Digit Symbol-Coding task were administered. The val66met BDNF genotype and serum interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) concentrations were determined as potential confounders.

resultsIn subjects with CAD (n=88; 85.2% male, mean age 62.8±10.5 yr), cardiopulmonary fitness was associated with higher serum BDNF concentrations (β=.305, p=.013). Higher serum BDNF concentrations were associated with higher MMSE scores (F(1,87)=15.406, p<.0005) and better performance on the Digit Symbol-Coding task (F(1,87)=9.620, p=.003). IL-6, TNF-α and the val66met genotype did not influence these results.

conclusionSerum BDNF concentrations were associated with cardiopulmonary fitness, psychomotor processing speed and overall cognition in subjects with CAD.

Indexed as

AgedBrain-Derived Neurotrophic FactorCognitionConfounding Factors, EpidemiologicCoronary DiseaseC-Reactive ProteinEnzyme-Linked Immunosorbent AssayExercise TestFemaleGenotypeHumansInterleukin-6MaleMiddle AgedNeuropsychological TestsPhysical FitnessBrain-Derived Neurotrophic FactorC-Reactive ProteinIL6 protein, humanInterleukin-6

Identifiers

PMID21554945
PMCPMC4540594

What OpenQuestion holds

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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.