E-Cigarettes and Smoking Cessation: A Population-Level Analysis

Debate Among Clinicians and Researchers

Clinicians and researchers continue to discuss the effectiveness of e-cigarettes in promoting smoking cessation at a population level. An analysis utilizing five years of data from the US Current Population Survey-Tobacco Use Supplement (CPS-TUS) presents compelling evidence that e-cigarette use can enhance smoking cessation rates.

Varied Regulatory Policies

Regulatory policies regarding e-cigarette use differ significantly across countries. Within the medical community, there remains skepticism about the broader effects of e-cigarettes. Some studies indicate that e-cigarettes may be as effective as nicotine replacement therapy for helping individuals quit smoking. Conversely, other research emphasizes the detrimental effects of dual usage—using e-cigarettes alongside traditional cigarettes—which could negate any benefits for individual smokers and yield an overall negative impact on public health.

Trends in Smoking Cessation Rates

Despite a notable increase in e-cigarette usage, smoking cessation rates in the United States have seen significant improvement for the first time in nearly 25 years.

Research Findings

Shu-Hong Zhu, the director of the Centre for Research and Intervention in Tobacco Control at the University of California, along with colleagues, published their findings in the British Medical Journal on July 26, 2017. Their study examined the impact of e-cigarettes on smoking cessation rates through a comprehensive population survey comparing data from various years: 2001-02, 2003, 2006-07, 2010-11, and 2014-15. In this context, smoking cessation was defined as quitting smoking for at least three months, while a quit attempt was characterized by maintaining cessation for at least 24 hours.

Statistically significant improvements in both smoking cessation rates and quit attempts were noted between 2010-11 and 2014-15. Furthermore, data from the 2014-15 CPS-TUS revealed that e-cigarette users exhibited higher success rates in both quitting and attempting to quit compared to non-users.

Study Limitations and External Factors

It is important to acknowledge the limitations inherent in this observational study design, including potential participant bias due to self-reporting. Additionally, information regarding pharmacotherapy use was not captured in the surveys. The increase in smoking cessation and quit attempts coincided with a national media campaign, known as TIPS, aimed at reaching a majority of US smokers by 2014-15. Notably, the rates of attempts and cessation among non-e-cigarette users did not show statistically significant changes, indicating that improvements were primarily seen in e-cigarette users.

Conclusion and Implications

This study provides crucial data suggesting that e-cigarette use is effective in enhancing smoking cessation rates at both individual and population levels. E-cigarette users show a greater likelihood of attempting to quit smoking and achieving successful cessation. Lawmakers and policymakers should consider these findings when developing regulatory policies and planning tobacco control interventions.

Written by Jessica Caporuscio, PharmD

Reference: Zhu SH, Zhuang YL, Wong S, et al. E-cigarette use and associated changes in population smoking cessation: evidence from US current population surveys. BMJ. 2017.