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Association between age at first reported e‐cigarette use and subsequent regular e‐cigarette, ever cigarette and regular cigarette use

Background and aims Association of electronic cigarette use and subsequent smoking has received considerable attention, although age of first use has not. This study tested differences in regular (e‐cigarettes, cigarettes) and ever (cigarettes) use between e‐cigarette user groups: early versus never...

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Bibliographic Details
Published in:Addiction (Abingdon, England) England), 2021-07, Vol.116 (7), p.1839-1847
Main Authors: Conner, Mark, Grogan, Sarah, Simms‐Ellis, Ruth, Cowap, Lisa, Armitage, Christopher J., West, Robert, Marshall, Anna‐Marie, Siddiqi, Kamran
Format: Article
Language:English
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Summary:Background and aims Association of electronic cigarette use and subsequent smoking has received considerable attention, although age of first use has not. This study tested differences in regular (e‐cigarettes, cigarettes) and ever (cigarettes) use between e‐cigarette user groups: early versus never users, late versus never users, early versus late users and effects of controlling for covariates. Design Prospective study with 12‐ and 24‐month follow‐up of e‐cigarette/cigarette ever/regular use with data from an intervention. Setting Forty‐five schools in England (Staffordshire and Yorkshire). Participants Never smokers (3289 13–14‐year‐olds) who were part of a cluster randomized controlled trial. Measurements The sample was divided into groups of e‐cigarette users: early users (at 13–14 years), late users (at 14–15 years) and never users (at 13–14 and 14–15 years). Dependent variables were self‐reported regular e‐cigarette and cigarette use and ever cigarette use at 15–16 years. Covariates were assessed. Findings Early and late users compared with never users were significantly more likely to be regular e‐cigarette users [early: odds ratio (OR) = 9.42, 95% confidence interval (CI) = 5.38, 16.49, P 
ISSN:0965-2140
1360-0443
DOI:10.1111/add.15386