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E-cigarette use significantly increases a person's risk of developing chronic obstructive pulmonary disease. Pixabay

E-cigarette use significantly increases a person’s risk of developing chronic lung diseases like asthma, bronchitis, emphysema or chronic obstructive pulmonary disease, says a new study.

The study, published in the American Journal of Preventive Medicine, also found that people who used e-cigarettes and also smoked tobacco — by far the most common pattern among adult e-cigarette users — were at an even higher risk of developing chronic lung disease than those who used either product alone.


“What we found is that for e-cigarette users, the odds of developing lung disease increased by about a third, even after controlling for their tobacco use and their clinical and demographic information,” said study senior author Stanton Glantz, PhD, Professor at the University of California in the US.

“We concluded that e-cigarettes are harmful on their own, and the effects are independent of smoking conventional tobacco,” Glantz said.

The findings are based on an analysis of publicly available data from the Population Assessment of Tobacco and Health (PATH), which tracked e-cigarette and tobacco habits as well as new lung disease diagnoses in over 32,000 American adults from 2013 to 2016.

Though several earlier population studies had found an association between e-cigarette use and lung disease at a single point in time, these cross-sectional studies provided a snapshot that made it impossible for researchers to say whether lung disease was being caused by e-cigarettes or if people with lung disease were more likely to use e-cigarettes.


E-cigarettes are harmful on their own, and the effects are independent of smoking conventional tobacco. Pixabay

By starting with people who did not have any reported lung disease, taking account of their e-cigarette use and smoking from the start, and then following them for three years, this study offers stronger evidence of a causal link between adult e-cigarette use and lung diseases than prior studies.

Though current and former e-cigarette users were 1.3 times more likely to develop chronic lung disease, tobacco smokers increased their risk by a factor of 2.6.

“Dual users — the most common use pattern among people who use e-cigarettes — get the combined risk of e-cigarettes and conventional cigarettes, so they’re actually worse off than tobacco smokers,” said Glantz.

The study also found that switching from smoked tobacco to e-cigarettes lowered the risk of developing lung disease, fewer than one per cent of the smokers had completely switched to e-cigarettes.

Importantly, the results reported in this study are unrelated to EVALI (E-cigarette or Vaping Product Use-Associated Lung Injury), the acute lung disease first reported last summer, severe cases of which sent several e-cigarette users to the hospital and others to an early grave.

Though scientists are still working to determine the cause of EVALI, prior physiological studies in both animals and humans found that e-cigarettes suppress the immune system and increase the levels of stress-related proteins in the lungs.

Also Read- Food Labels Must Inform People the Amount of Exercise Needed to Burn Calories: Study

And chemical analyses showed that e-cigarettes contain higher levels of certain toxic chemicals than conventional cigarettes.

But the new study shows that these are not the only health threats posed by e-cigarettes.

“This study contributes to the growing case that e-cigarettes have long-term adverse effects on health and are making the tobacco epidemic worse,” Glantz added. (IANS)


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