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

Conner, Mark, Grogan, Sarah, Simms‐Ellis, Ruth, COWAP, Lisa, Armitage, Christopher J., West, Robert, Marshall, Anna‐Marie and Siddiqi, Kamran (2021) Association between age at first reported e‐cigarette use and subsequent regular e‐cigarette, ever cigarette and regular cigarette use. Addiction. ISSN 0965-2140

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Abstract or description

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 randomised controlled trial.
Measurements: Sample divided into groups of e-cigarette users: early users (at 13-14 years), late users (at 14-15 years), never users (at 13-14 and 14-15 years). Dependent variables were self-reported regular e-cigarette and cigarette use, ever cigarette use at 15-16 years. Covariates were assessed.
Findings: Early users and late users compared with never users were significantly more likely to be regular e-cigarette users (early: OR=9.42, 95%CI=5.38, 16.49, p<.001; late: OR=6.89, 95%CI=4.11, 11.54, p<.001), ever cigarette users (early: OR=7.96, 95%CI=6.02, 10.53, p<.001; late: OR=5.13, 95%CI=3.85, 6.84, p<.001), and regular cigarette users (early: OR=7.80, 95%CI=3.99, 15.27, p<.001; late: OR=4.34, 95%CI=1.93, 9.77, p<.001) at age 15-16 years. Late users compared with early users had significantly lower rates of ever use of cigarettes at 15-16 years (OR=0.48, 95%CI=0.35, 0.66, p<.001), although this difference was non-significant at 12 months after first use of e-cigarettes (OR=0.89, 95%CI 0.64, 1.25, p = .498). Controlling for covariates did not change findings.
Conclusions: Adolescents in England who report using e-cigarettes at 13-14 years of age have higher rates of subsequently initiating cigarette use than adolescents who report using e-cigarettes at 14-15 years, a difference that may be attributable to a longer period of time to initiate cigarette use in former group.
Key words: electronic nicotine delivery systems; e-cigarettes; smoking; harm reduction; intervention.

Item Type: Article
Faculty: School of Life Sciences and Education > Psychology
Depositing User: Lisa COWAP
Date Deposited: 25 Jan 2021 16:16
Last Modified: 26 Jan 2021 04:30
URI: http://eprints.staffs.ac.uk/id/eprint/6779

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