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E-cigarettes and smoking cessation: evidence from a systematic review and meta-analysis

Rahman, Muhammad Aziz, Hann, Nicholas, Wilson, Andrew, Mnatzaganian, George and Worrall-Carter, Linda 2015, E-cigarettes and smoking cessation: evidence from a systematic review and meta-analysis, PLoS one, vol. 10, no. 3, doi: 10.1371/journal.pone.0122544.

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Title E-cigarettes and smoking cessation: evidence from a systematic review and meta-analysis
Author(s) Rahman, Muhammad Aziz
Hann, Nicholas
Wilson, Andrew
Mnatzaganian, George
Worrall-Carter, Linda
Journal name PLoS one
Volume number 10
Issue number 3
Total pages 16
Publisher Public Library of Science (PLoS)
Place of publication San Francisco, Calif.
Publication date 2015-03-30
ISSN 1932-6203
Keyword(s) electronic cigarettes
humans
nicotine
outcome assessment (health care)
smoking cessation
Summary BACKGROUND: E-cigarettes are currently being debated regarding their possible role in smoking cessation and as they are becoming increasingly popular, the research to date requires investigation.

OBJECTIVES: To investigate whether the use of e-cigarettes is associated with smoking cessation or reduction, and whether there is any difference in efficacy of e-cigarettes with and without nicotine on smoking cessation.

DATA SOURCES: A systematic review of articles with no limit on publication date was conducted by searching PubMed, Web of Knowledge and Scopus databases.

METHODS: Published studies, those reported smoking abstinence or reduction in cigarette consumption after the use of e-cigarettes, were included. Studies were systematically reviewed, and meta-analyses were conducted using Mantel-Haenszel fixed-effect and random-effects models. Degree of heterogeneity among studies and quality of the selected studies were evaluated.

RESULTS: Six studies were included involving 7,551 participants. Meta-analyses included 1,242 participants who had complete data on smoking cessation. Nicotine filled e-cigarettes were more effective for cessation than those without nicotine (pooled Risk Ratio 2.29, 95%CI 1.05-4.97). Amongst 1,242 smokers, 224 (18%) reported smoking cessation after using nicotine-enriched e-cigarettes for a minimum period of six months. Use of such e-cigarettes was positively associated with smoking cessation with a pooled Effect Size of 0.20 (95%CI 0.11-0.28). Use of e-cigarettes was also associated with a reduction in the number of cigarettes used.

LIMITATIONS: Included studies were heterogeneous, due to different study designs and gender variation. Whilst we were able to comment on the efficacy of nicotine vs. non-nicotine e-cigarettes for smoking cessation, we were unable to comment on the efficacy of e-cigarettes vs. other interventions for cessation, given the lack of comparator groups in the studies included in this meta-analysis.

CONCLUSIONS: Use of e-cigarettes is associated with smoking cessation and reduction. More randomised controlled trials are needed to assess effectiveness against other cessation methods.
Language eng
DOI 10.1371/journal.pone.0122544
Field of Research 119999 Medical and Health Sciences not elsewhere classified
Socio Economic Objective 929999 Health not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083298

Document type: Journal Article
Collections: School of Medicine
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Scopus Citation Count Cited 78 times in Scopus
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.