For both studies, the researchers caution that they werent designed to show that vaping directly causes lung disease, but only whether doing so was associated with an increased likelihood of having disease. The researchers also didnt distinguish between vaping tobacco compared with cannabis. They also cautioned that self-reports via telephone surveys may not be wholly reliable. However, they say their findings demonstrate the need for continued research with e-cigarette users over time to confirm and clarify the risks.
Although e-cigarettes may turn out to be safer overall than traditional combustible cigarettes, our studies add to growing evidence that they carry health risks, says Michael Blaha, M.D., M.P.H., professor of medicine at the Johns Hopkins University School of Medicine. These studies are the first in a series of larger and long-term studies that will more definitively provide evidence to inform tobacco users and regulators.
Asthma, marked by inflammation of the airways and shortness of breath, affects an estimated 25 million Americans, and life-threatening episodes can be triggered easily by pollution, allergies and smoking. COPD, which affects some 16 million Americans, describes a group of disorders including emphysema and chronic bronchitis that make it hard to breathe due to permanent damage to the lungs over time. Rates of asthma and COPD are rising worldwide, according to the World Health Organization. Most cases of COPD result from smoking traditional cigarettes.
A study published by Blaha earlier this year in the Annals of Internal Medicine estimated that 1.4% of people, or about 1.9 million people in the U.S., solely use e-cigarettes. Scattered reports have linked the practice to a spike in respiratory illnesses dubbed EVALI (e-cigarette, or vaping, product use-associated lung injury), affecting more than 2,500 people and associated with numerous deaths, according to the Centers for Disease Control and Prevention. Because vaping and the products inhaled with it are still relatively new to the market, its safety remains unclear.
To shed some light on the risk, the researchers took advantage of national survey data gathered by the Behavioral Risk Factor Surveillance System from 2016 and 2017. This annual survey, commissioned by the U.S. Centers for Disease Control and Prevention, consisted of telephone interviews of more than 400,000 adult participants and provides data on health-related risk behaviors and chronic medical conditions.
In the analysis published in BMC Pulmonary Medicine, the investigators analyzed data from 402,822people who identified themselves as never smokers, meaning they said they had smoked less than 100 combustible cigarettes in their lifetimes. Of these, 3,103 reported using e-cigarettes or vaping, and separately 34,074 people reported having asthma. The average age of e-cigarette users was 1824. About 67% of e-cigarette users were men. Approximately 57% of e-cigarette users reported that they were white, 19% were Hispanic and 12% were black.
Almost 11% of the e-cigarette users reported having asthma, compared with 8% of those who had never used e-cigarettes. Those people who reported being current e-cigarette users were 39% more likely to self-report having asthma compared with those people who said they never used e-cigarettes. Those who said they used e-cigarettes some days were 31% more likely, and daily users were 73% more likely to report asthma, compared with non-e-cigarette users.
For the study published in the American Journal of Preventive Medicine, the researchers analyzed the same data from all the questioned participants. From the more than 700,000 interviewees, about 61% reported being never smokers, about 9% were current smokers, 30% were former smokers, more than 3% said they currently used e-cigarettes, and 2% said they used both e-cigarettes and smoked. The e-cigarette users were more likely to fall in the age range of 3034, almost 60% were men, 72% identified as white, 8% as black, 3.5% as Asian and 11% as Hispanic.
Of those who said they used e-cigarettes, about 11% said they had chronic bronchitis, emphysema or COPD, compared with 5.6% of people who said they had never used e-cigarettes. Among never smokers, current e-cigarette users were 75% more likely to report having COPD, compared with those who had never used them. Those who said they used both e-cigarettes and smoked cigarettes were almost six times more likely to report having COPD, compared with those who had never used either, whereas just using combustible cigarettes alone increased the odds by three times.
As a physician, I am most worried about those who use both e-cigarettes and combustible cigarettes because they may end up taking in the most nicotine, which may do the most damage, says Albert Osei, M.D., M.P.H., a postdoctoral fellow at the Johns Hopkins University School of Medicine and lead author on the study. Through public health campaigns, we finally had smoking levels down in some populations, but now with the current vaping epidemic, I foresee a whole new previously tobacco-nave, young generation becoming dependent on nicotine if we do not intensify public health education efforts.
According to the CDC, of the 16 million people in the U.S. who have COPD, 38% of them still smoke.
Additional authors on these studies include Mohammadhassan Mirbolouk, Olusola Orimoloye, Omar Dzaye, S. M. Iftekhar Uddin, Zeina Dardari and Shyam Biswal of Johns Hopkins; Andrew DeFilippis and Aruni Bhatnagar of University of Louisville; Emelia Benjamin of Boston University; and Michael Hall of University of Mississippi Medical Center.
This study was supported by a grant from the American Heart Association Tobacco Regulation and Addiction Center, which is funded by the National Heart, Lung, and Blood Institute/U.S. Food and Drug Administration (2U54HL120163).
COI: Defilippis receives funding from Astra Zeneca and consults for Radiometer America, Inc.
See more here:
Vaping Increases Odds of Asthma and COPD - Johns Hopkins Medicine
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