Evidence map›Paper›PMID 33506196›Full record

ArticleCrohn's & colitis 3602020

Exploring the Effects of Cigarette Smoking on Inflammatory Bowel Disease Using Mendelian Randomization.

Daniel P Jones, Tom G Richardson, George Davey Smith, David Gunnell, Marcus R Munafò, Robyn E Wootton

Open access · goldAbstract read
In one paragraph

Article in Crohn's & colitis 360, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.1field-weighted citation impact, top 22% 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

12 citing papers in PubMed, 14 citations in OpenAlex.

  1. Review
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  4. Mendelian Randomization Analysis of the Causal Effect of Cigarette Smoking on Hospital Costs.Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco · 2024
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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

6 authors at 3 institutions in 1 country.

Daniel P JonesDepartment of Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.ORCID 0000-0001-8518-3608
Tom G RichardsonDepartment of Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
George Davey SmithDepartment of Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
David GunnellDepartment of Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Marcus R MunafòMRC Integrative Epidemiology Unit, Bristol, UK.
Robyn E WoottonMRC Integrative Epidemiology Unit, Bristol, UK.
University Hospitals Bristol NHS Foundation Trust · GBSouthmead Hospital · GBUniversity of Bristol · GB

Funding

Medical Research Council MC_UU_00011/1Medical Research Council MC_UU_00011/7
6 · The paper itself

Abstract

backgroundPrevious observational evidence has suggested an association between smoking and inflammatory bowel disease (IBD).

methodsWe used observational techniques followed by Mendelian randomization to explore whether smoking is a causal factor in the development of IBD and its subtypes.

resultsIn those who have ever smoked, we observed increased risk of IBD and, in current smokers, we observed increased risk of Crohn disease and decreased risk of ulcerative colitis. However, our Mendelian randomization analyses found little evidence that smoking affects the development of IBD.

conclusionOverall, our results suggest that smoking does not causally influence the risk of IBD.

Indexed as

inflammatory bowel diseaseMendelian randomizationsmokingUK Biobank

Identifiers

PMID33506196
PMCPMC7809707
OpenAlexW3011423302

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.