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Review
. 2016 Jan 12;13(1):120.
doi: 10.3390/ijerph13010120.

Cigarette Smoking and Electronic Cigarettes Use: A Meta-Analysis

Meng Wang  1 , Jian-Wei Wang  2 , Shuang-Shuang Cao  3 , Hui-Qin Wang  4 , Ru-Ying Hu  5
Affiliations
Review

Cigarette Smoking and Electronic Cigarettes Use: A Meta-Analysis

Meng Wang et al. Int J Environ Res Public Health. .

Abstract

Increasing evidence indicates that cigarette smoking is a strong predictor of electronic cigarettes (e-cigarettes) use, particularly in adolescents, yet the effects has not be systematically reviewed and quantified. Relevant studies were retrieved by searching three databases up to June 2015. The meta-analysis results were presented as pooled odds ratios (ORs) with 95% confidence intervals (CIs) calculated by a random-effects model. Current smokers were more likely to use e-cigarette currently (OR: 14.89, 95% CI: 7.70-28.78) and the probability was greater in adolescents than in adults (39.13 vs. 7.51). The probability of ever e-cigarettes use was significantly increased in smokers (OR: 14.67, 95% CI: 11.04-19.49). Compared with ever smokers and adults, the probabilities were much greater in current smokers (16.10 vs. 9.47) and adolescents (15.19 vs. 14.30), respectively. Cigarette smoking increases the probability of e-cigarettes use, especially in current smokers and adolescents.

Keywords: cigarette smoking; electronic cigarette; meta-analysis.

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Figures

Figure 1
Figure 1
Study selection process.
Figure 2
Figure 2
Effects of current smoking on current e-cigarettes use among adolescents and adults (0: adolescent 1: adult).
Figure 3
Figure 3
Effects of ever and current cigarette smoking on ever e-cigarettes use (0: ever smoking; 1: current smoking).
Figure 4
Figure 4
Effects of cigarette smoking on ever e-cigarettes use among adolescents and adults (0: adolescent; 1: adult).
See this image and copyright information in PMC

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