Evidence map›Paper›PMID 34348959›Full record

ArticleCancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology2021

Association between Smoking Cannabis and Quitting Cigarettes in a Large American Cancer Society Cohort.

J Lee Westmaas, Sara E Strollo, Christina C Newton, Brian D Carter, W Ryan Diver, W Dana Flanders, Victoria L Stevens, Alpa V Patel, Kassandra I Alcaraz, Johannes Thrul and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.6field-weighted citation impact, top 30% 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

5 citing papers in PubMed, 6 citations in OpenAlex.

  1. Trial
  2. Article
  3. Cannabis Use and Subsequent Cigarette Discontinuation Among U.S. Adults in the Population Assessment of Tobacco and Health Study, Waves 1-5.Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco · 2025
    Article
  4. Article
  5. Article
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

11 authors at 4 institutions in 1 country.

J Lee WestmaasAmerican Cancer Society, Atlanta, Georgia. lee.westmaas@cancer.org.
Sara E StrolloAmerican Cancer Society, Atlanta, Georgia.ORCID 0000-0002-9119-7114
Christina C NewtonAmerican Cancer Society, Atlanta, Georgia.
Brian D CarterAmerican Cancer Society, Atlanta, Georgia.
W Ryan DiverAmerican Cancer Society, Atlanta, Georgia.
W Dana FlandersEmory University, Atlanta, Georgia.ORCID 0000-0003-4069-3262
Victoria L StevensEmory University, Atlanta, Georgia.ORCID 0000-0003-0259-4407
Alpa V PatelAmerican Cancer Society, Atlanta, Georgia.
Kassandra I AlcarazGeorgia State University, Atlanta, Georgia.
Johannes ThrulJohns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.ORCID 0000-0001-8929-9579
Eric J JacobsAmerican Cancer Society, Atlanta, Georgia.
American Cancer Society · USEmory University · USGeorgia State University · USJohns Hopkins University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCannabis use is increasing, including among smokers, an at-risk population for cancer. Research is equivocal on whether using cannabis inhibits quitting cigarettes. The current longitudinal study investigated associations between smoking cannabis and subsequently quitting cigarettes.

methodsParticipants were 4,535 adult cigarette smokers from a cohort enrolled in the American Cancer Society's Cancer Prevention Study-3 in 2009-2013. Cigarette quitting was assessed on a follow-up survey in 2015-2017, an average of 3.1 years later. Rates of quitting cigarettes at follow-up were examined by retrospectively assessed baseline cannabis smoking status (

resultsAdjusted cigarette quitting rates at follow-up did not differ significantly by baseline cannabis smoking status [never 36.2%, 95% confidence interval (CI), 34.5-37.8; former 34.1%, CI, 31.4-37.0; recent 33.6%, CI, 30.1-37.3], nor by frequency of cannabis smoking (low 31.4%, CI, 25.6-37.3; moderate 36.7%, CI, 30.7-42.3; high 34.4%, CI, 28.3-40.2) among recent baseline cannabis smokers. In cross-sectional analyses conducted at follow-up, the proportion of cigarette smokers intending to quit smoking cigarettes in the next 30 days did not differ by cannabis smoking status (

conclusionsResults do not support the hypothesis that cannabis smoking inhibits quitting cigarette smoking among adults. IMPACT: Future longitudinal research should include follow-ups of >1 year, and assess effects of intensity/frequency of cannabis use and motivation to quit on smoking cessation.

Indexed as

AdultCigarette SmokingCross-Sectional StudiesFemaleFollow-Up StudiesHumansIntentionLongitudinal StudiesMaleMarijuana SmokingMiddle AgedSmoking Cessation

Identifiers

PMID34348959
PMCPMC9398124
OpenAlexW3187847081

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.