Cigarette Smoking and Electronic Cigarettes Use: A Meta-Analysis

Area of Science:

• Public Health
• Addiction Research
• Tobacco Control

Background:

• Cigarette smoking is a known risk factor for various health issues.
• Electronic cigarette (e-cigarette) use is rising, particularly among young people.
• The relationship between cigarette smoking and e-cigarette uptake requires systematic quantification.

Purpose of the Study:

• To systematically review and quantify the association between cigarette smoking and e-cigarette use.
• To compare the probability of e-cigarette use among current smokers versus ever smokers.
• To assess differences in this association between adolescents and adults.

Main Methods:

• A meta-analysis was conducted on relevant studies identified through searches of three databases up to June 2015.
• Pooled odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using a random-effects model.
• The analysis focused on current and ever e-cigarette use in relation to smoking status and age group.

Main Results:

• Current smokers were significantly more likely to currently use e-cigarettes (OR: 14.89).
• The probability of current e-cigarette use was substantially higher in adolescents compared to adults (39.13% vs. 7.51%).
• Smokers had a significantly increased probability of ever using e-cigarettes (OR: 14.67), with higher probabilities observed in current smokers and adolescents.

Conclusions:

• Cigarette smoking is a strong predictor of e-cigarette use.
• The association is particularly pronounced among current smokers and adolescents.
• Findings highlight the need for targeted interventions to address dual use and prevent e-cigarette uptake among smokers.