Increased Stroke Risk Linked to Combined Cigarette and E-Cigarette Use

Research Findings

Recent research indicates that individuals who use both traditional cigarettes and e-cigarettes face nearly double the risk of stroke compared to those who smoke cigarettes alone. As the popularity of e-cigarettes surges, the number of young users continues to rise. The Centers for Disease Control and Prevention (CDC) reports that over 9 million adults in the United States currently use e-cigarettes, with usage among high school students increasing from 12% to 21%.

Health Implications of E-Cigarettes

E-cigarettes have often been viewed as a safer alternative for quitting smoking. However, ongoing scientific investigations are revealing the long-term health effects associated with e-cigarette use. Notably, nicotine, which is present in 99% of e-cigarettes sold in the U.S., can negatively impact the development of the adolescent brain, which continues to mature until around age 25. An outbreak of lung injuries linked to e-cigarette use has prompted the government to examine these products more critically.

Study Overview

A study published in The American Journal of Preventive Medicine analyzed data from over 160,000 participants aged 18 to 44 to assess the relationship between e-cigarette use and stroke risk. The findings reveal that young adults who smoke both e-cigarettes and traditional cigarettes are approximately 1.83 times more likely to experience a stroke compared to those who smoke only traditional cigarettes. Furthermore, this group is nearly three times more likely to suffer a stroke compared to non-smokers.

Adjusted Odds Ratios

The study reported the following adjusted odds ratios:
– Smokers of traditional cigarettes alone are 1.59 times more likely to have a stroke compared to non-smokers.
– Individuals who have switched from traditional cigarettes to e-cigarettes are 2.54 times more likely to have a stroke than non-smokers.
– Those who combine traditional and e-cigarettes have a 2.91 times higher likelihood of experiencing a stroke compared to non-smokers.

Interestingly, individuals who exclusively use e-cigarettes and have never smoked traditional cigarettes show no increased stroke risk. This may be attributed to factors such as younger age, better socioeconomic status, and overall cardiovascular health typically found in this demographic. However, if a young adult has a history of smoking traditional cigarettes, the risk of stroke significantly increases when using e-cigarettes, even in comparison to those who only smoke traditional products.

Need for Continued Research

Despite being perceived as ‘safe’ for some time, emerging research increasingly highlights the harmful effects of e-cigarettes. This underscores the necessity for ongoing studies to better understand the implications of e-cigarette use and their safety as a smoking cessation aid.

References

– Parekh, Tarang et al. (2020). Risk of Stroke With E-Cigarette and Combustible Cigarette Use in Young Adults. American Journal of Preventive Medicine, Published online, January 6, 2020.
– Centers for Disease Control and Prevention. QuickStats: Age-Adjusted Percentage of Adults Who Had Ever Used an E-cigarette, by Race and Ethnicity — National Health Interview Survey, United States, 2014 and 2018. MMWR Morb Mortal Wkly Rep 2019;68:1102.
– Centers for Disease Control and Prevention. (2020). Quick Facts on the Risks of E-cigarettes for Young People.
– Nhlbi.nih.gov. (2020). Stroke | National Heart, Lung, and Blood Institute (NHLBI).
– Pew Research Center. (2020). Before recent outbreak, vaping was on the rise in U.S., especially among young people.