Evidence map›Paper›PMID 28493936›Full record

ArticlePloS one2017

Serum folate concentration and the incidence of lung cancer.

Katarzyna Durda, Krzysztof Kąklewski, Satish Gupta, Michał Szydłowski, Piotr Baszuk, Katarzyna Jaworska-Bieniek, Grzegorz Sukiennicki, Katarzyna Kaczmarek, Piotr Waloszczyk, Steven Narod and 2 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 4 pooled it
4.0field-weighted citation impact, top 6% 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

17 citing papers in PubMed, 4 syntheses or guidelines pooled it, 35 citations in OpenAlex.

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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

12 authors at 3 institutions in 1 country.

Katarzyna DurdaDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Krzysztof KąklewskiDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Satish GuptaDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Michał SzydłowskiFaculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology Szczecin, al. Piastów 19, Szczecin, Poland.
Piotr BaszukDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Katarzyna Jaworska-BieniekDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Grzegorz SukiennickiDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Katarzyna KaczmarekDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Piotr WaloszczykIndependent Laboratory of Pathology, Zdunomed, Szczecin, Poland.
Steven NarodWomens College Research Institute, Toronto, Ontario, Canada.
Jan LubińskiDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Anna JakubowskaDepartmentof Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Połabska 4, Szczecin, Poland.
Pomeranian Medical University · PLInternational Hereditary Cancer Center · PLWest Pomeranian University of Technology · PL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLung cancer is a leading cause of cancer-related mortality globally. Folate helps to maintain DNA integrity and to regulate gene expression. Serum folate levels may affect the risk of several cancers, including lung cancer. In this study we evaluated the association between serum folate concentration and variations in genes involved in folate metabolism with lung cancer incidence in Poland.

methodsThe study included 366 lung cancer patients and 366 control subjects. We measured serum folate concentration and genotyped six variants in MTHFR, MTR and MTRR genes. The odds ratios of being diagnosed with lung cancer were calculated using conditional univariable and multivariable logistic regression with respect to folate level and genotypes.

resultsThe mean serum folate level was lower in lung cancer cases than in control group (20.07 nmol/l vs. 22.52 nmol/l, p = 0.002). The odds ratio for lung cancer declined with increasing serum content of the folate. The folate concentration of >25.71 nmol/l (IVth quartile) in comparison to <15.92 nmol/l (Ist quartile) was associated with an odds ratio of 0.61 (95%CI 0.40-0.95, p = 0.03). The analysis of variations in MTHFR, MTR and MTRR genes did not reveal any significant difference between lung cancer cases and controls in univariable and multivariable analyses.

conclusionIn this case-control study, lower serum folate concentrations were associated with a higher risk of lung cancer diagnosis. Although previous findings have been somewhat mixed, our results add to the evidence that circulating folate levels may be an indicator of lung cancer risk.

Indexed as

5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseAdultAgedAged, 80 and overCase-Control StudiesFemaleFerredoxin-NADP ReductaseFolic AcidGenotypeHumansIncidenceLogistic ModelsLung NeoplasmsMethylenetetrahydrofolate Reductase (NADPH2)Middle AgedOdds Ratio5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseFerredoxin-NADP ReductaseFolic Acidmethionine synthase reductaseMethylenetetrahydrofolate Reductase (NADPH2)MTHFR protein, humanMTR protein, human

Identifiers

PMID28493936
PMCPMC5426769
OpenAlexW2612683892

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.