Evidence map›Paper›PMID 26518023›Full record

ArticlePsychopharmacology2016

Effects of cigarette smoking and alcohol use on neurocognition and BDNF levels in a Chinese population.

Xiang Yang Zhang, Yun-Long Tan, Da-Chun Chen, Shu-Ping Tan, Fu-De Yang, Giovana B Zunta-Soares, Jair C Soares

Abstract read
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In one paragraph

Article in Psychopharmacology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing 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

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

  1. Pooled it
  2. Pooled it
  3. Review
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  15. Effect of Smoking on Cognitive Functioning in Young Saudi Adults.Medical science monitor basic research · 2017
    Article
  16. Article
  17. 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

7 authors.

Xiang Yang ZhangBeijing HuiLongGuan Hospital, Peking University, Beijing, China. zhangxy9@gmail.com.
Yun-Long TanBeijing HuiLongGuan Hospital, Peking University, Beijing, China.
Da-Chun ChenBeijing HuiLongGuan Hospital, Peking University, Beijing, China.
Shu-Ping TanBeijing HuiLongGuan Hospital, Peking University, Beijing, China.
Fu-De YangBeijing HuiLongGuan Hospital, Peking University, Beijing, China.
Giovana B Zunta-SoaresDepartment of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, USA.
Jair C SoaresDepartment of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveFew studies have examined the potential interactive effect of both smoking and drinking on cognition. Brain-derived neurotrophic factor (BDNF) plays a critical role in cognition. This is the first study to examine the neurocognitive consequences of cigarette smoking combined with chronic alcohol consumption and their relationship to serum BDNF levels in a Chinese Han population. MATERIALS AND

methodsWe recruited 191 healthy male subjects, including 47 isolated smokers, 31 isolated chronic alcohol users, 58 combined smokers and chronic alcohol users, and 55 non-smokers and non-alcohol users. We then compared the repeatable battery for the assessment of neuropsychological status (RBANS) scores and serum BDNF levels in these four groups.

resultsWhen compared to the non-smoking + non-alcohol-using group, the smoking group performed worse on immediate memory, attention, language, and RBANS total score. There were no significant differences in the RBANS scores between the alcohol-using group and non-smoking + non-alcohol-using group, or between the smoking group and smoking + alcohol-using group. We did not find an association between BDNF and smoking or drinking status or between BDNF and cognitive performance. In the smoking group, there was a significant correlation between BDNF and carbon monoxide concentration, and between BDNF and the Fagerstrom Test for Nicotine Dependence (FTND) total score.

conclusionsOur results suggest that smoking is associated with cognitive decline, but not with BDNF levels in a normal population. However, smoking severity is positively associated with BDNF levels. Concomitant alcohol use does not worsen the cognitive decline caused by smoking.

Indexed as

AdultAgedAlcohol DrinkingAsian PeopleAttentionBrain-Derived Neurotrophic FactorCarbon MonoxideChinaCognitionHumansLanguageMaleMemoryMiddle AgedNeuropsychological TestsPsychomotor PerformanceBDNF protein, humanBrain-Derived Neurotrophic FactorCarbon MonoxideAlcoholBrain-derived neurotrophic factorCognitionNicotineSmoking

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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.