Evidence map›Paper›PMID 34026564›Full record

ArticleToxicology reports2021

A randomized controlled study in healthy participants to explore the exposure continuum when smokers switch to a tobacco heating product or an E-cigarette relative to cessation.

Michael McEwan, Nathan Gale, James K Ebajemito, Oscar M Camacho, George Hardie, Christopher J Proctor, James Murphy

Abstract read
In one paragraph

Article in Toxicology reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 3 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

21 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Exposure to Tobacco-Specific Nitrosamines Among People Who Vape, Smoke, or do Neither: A Systematic Review and Meta-Analysis.Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco · 2024
    Pooled it
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  14. What Can Current Biomarker Data Tell Us About the Risks of Lung Cancer Posed by Heated Tobacco Products?Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco · 2024
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  17. Chemical andToxicology reports · 2023
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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

7 authors.

Michael McEwanBritish American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK.
Nathan GaleBritish American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK.
James K EbajemitoBritish American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK.
Oscar M CamachoBritish American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK.
George HardieBritish American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK.
Christopher J ProctorDoctorProctorScience Ltd., 157 Cavendish Meads, Sunninghill, Ascot, SL5 9TG, UK.
James MurphyBritish American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCigarette smoking is associated with a number of diseases, such as cancer and cardiovascular diseases. Recently, there has been an increase in the use of electronic cigarettes (ECs) and tobacco-heating products (THPs) as an alternative to cigarettes, which may reduce the health burden associated with smoking. However, an exposure continuum when smokers switch to ECs or THPs compared to complete smoking cessation is not well established.

methods148 healthy smokers were randomized to either continue smoking cigarettes, switch to using the glo THP or a prototype EC, or completely quit any nicotine or tobacco product use for 5 days, after a 2-day baseline period. During this study breath and 24-h urine samples were collected for Biomarker of Exposure (BoE) analysis.

resultsAfter a 5-day switching period BoE levels showed a substantial significant decrease in levels from baseline in the groups using the glo THP, the prototype EC, and having quit all nicotine and tobacco use. On an exposure continuum, smokers who completely quit nicotine had the lowest levels of assessed BoEs, followed by those who switched to the EC and then those who switched to glo THP use. Participants who continued to smoke had the highest levels of BoEs.

conclusionsTHP or EC use over a 5-day period resulted in significant reductions in exposure to smoke toxicants, in some cases to levels similar to those for nicotine cessation. These results show that on an exposure continuum, nicotine cessation gives the greatest reduction in exposure to tobacco smoke toxicants, closely followed by the EC and the glo THP. These significant reductions in exposure to toxicants suggest that the glo THP and EC have the potential to be Reduced Risk Products. STUDY REGISTRATION: ISRCTN80651909.

Indexed as

Biomarker of exposuree-CigaretteHarm reductionSmokingTobacco heating product

Identifiers

PMID34026564
PMCPMC8131274

What OpenQuestion holds

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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.