Evidence map›Paper›PMID 28954281›Full record

SynthesisJournal of the National Cancer Institute2017

The Role of Obesity, Type 2 Diabetes, and Metabolic Factors in Pancreatic Cancer: A Mendelian Randomization Study.

Robert Carreras-Torres, Mattias Johansson, Valerie Gaborieau, Philip C Haycock, Kaitlin H Wade, Caroline L Relton, Richard M Martin, George Davey Smith, Paul Brennan

Open access · hybridAbstract readMeta-Analysis
In one paragraph

Synthesis in Journal of the National Cancer Institute, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 147 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
147citing papers in PubMed, 7 pooled it
10.2field-weighted citation impact, top 1% 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

147 citing papers in PubMed, 7 syntheses or guidelines pooled it, 272 citations in OpenAlex.

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  6. Type 2 Diabetes and Cancer: An Umbrella Review of Observational and Mendelian Randomization Studies.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2021
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87 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 2 countries.

Robert Carreras-TorresSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
Mattias JohanssonSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
Valerie GaborieauSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
Philip C HaycockSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
Kaitlin H WadeSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
Caroline L ReltonSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
Richard M MartinSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
George Davey SmithSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
Paul BrennanSection of Genetics, International Agency for Research on Cancer (IARC), Lyon, France; MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK; National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle at University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, UK.
University of Bristol · GBCentre International de Recherche sur le Cancer · FR

Funding

Cancer Research UK 19169Cancer Research UK 20138Cancer Research UK C18281/A19169Medical Research Council MC_UU_12013/1Medical Research Council MC_UU_12013/2World Health Organization 001
6 · The paper itself

Abstract

Background: Risk factors for pancreatic cancer include a cluster of metabolic conditions such as obesity, hypertension, dyslipidemia, insulin resistance, and type 2 diabetes. Given that these risk factors are correlated, separating out causal from confounded effects is challenging. Mendelian randomization (MR), or the use of genetic instrumental variables, may facilitate the identification of the metabolic drivers of pancreatic cancer. Methods: We identified genetic instruments for obesity, body shape, dyslipidemia, insulin resistance, and type 2 diabetes in order to evaluate their causal role in pancreatic cancer etiology. These instruments were analyzed in relation to risk using a likelihood-based MR approach within a series of 7110 pancreatic cancer patients and 7264 control subjects using genome-wide data from the Pancreatic Cancer Cohort Consortium (PanScan) and the Pancreatic Cancer Case-Control Consortium (PanC4). Potential unknown pleiotropic effects were assessed using a weighted median approach and MR-Egger sensitivity analyses. Results: Results indicated a robust causal association of increasing body mass index (BMI) with pancreatic cancer risk (odds ratio [OR] = 1.34, 95% confidence interval [CI] = 1.09 to 1.65, for each standard deviation increase in BMI [4.6 kg/m2]). There was also evidence that genetically increased fasting insulin levels were causally associated with an increased risk of pancreatic cancer (OR = 1.66, 95% CI = 1.05 to 2.63, per SD [44.4 pmol/L]). Notably, no evidence of a causal relationship was observed for type 2 diabetes, nor for dyslipidemia. Sensitivity analyses did not indicate that pleiotropy was an important source of bias. Conclusions: Our results suggest a causal role of BMI and fasting insulin in pancreatic cancer etiology.

Indexed as

Energy MetabolismBody Mass IndexCase-Control StudiesDiabetes Mellitus, Type 2FemaleGenetic Predisposition to DiseaseGenome-Wide Association StudyHumansInsulinInsulin ResistanceLikelihood FunctionsMaleObesityOdds RatioPancreatic NeoplasmsPolymorphism, Single NucleotideInsulin

Identifiers

PMID28954281
PMCPMC5721813
OpenAlexW2590777827

What OpenQuestion holds

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LicenceCC BY
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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.