According to a report by Naver on July 11th, Dr. Harry Tattan-Birch from University College London (UCL) recently published an important research study in the medical journal "JAMA Network." The study compared the nicotine absorption levels of over 1700 American children and delved into the potential impact of indoor e-cigarette use and secondhand smoke on children's health.
This study analyzed data from 1777 families with children aged 3 to 11 (average age 7.4) who participated in the National Health and Nutrition Examination Survey (NHANES) from 2017 to 2020. The study focused on children's exposure to indoor secondhand smoke and e-cigarettes within a week and measured their blood cotinine levels - a chemical produced after nicotine metabolism, which can effectively reflect nicotine intake.
A study has found that children exposed to secondhand cigarette smoke have an average blood cotinine level of 0.494 μg/L, while those who only have indoor exposure to e-cigarettes have significantly lower levels, at 0.081 μg/L, roughly one-sixth of the former. However, even children who have had indirect exposure to e-cigarettes have seen their nicotine levels increase nearly five times compared to those who have not been exposed to any smoke at all (blood cotinine level of 0.016 μg/L).
Dr. Harry Titan Burche pointed out, "Using real-world data rather than laboratory conditions, we have clearly found that children inhale significantly lower levels of nicotine from secondhand e-cigarettes compared to secondhand smoke. However, this finding does not mean that the health risks of e-cigarettes for children can be ignored." He emphasized that any form of indoor smoking or e-cigarette use should be strictly prohibited in children's environments, as even though e-cigarettes have lower nicotine exposure, they may still expose children to other harmful substances.
Additionally, the study also revealed an interesting phenomenon about the vaping habits of e-cigarette users: in the UK, as many as 90% of e-cigarette users prefer to use them indoors, while only half of cigarette smokers do the same. This difference suggests that further research is needed to explore the prevalence of indoor e-cigarette use and its potential health impacts on surrounding individuals, especially children.
Our research results provide important evidence for understanding the different impacts of e-cigarettes and traditional cigarettes on the health of bystanders," the researchers stated. "Although the amount of nicotine exposure from e-cigarettes is relatively low, once indoor use becomes more common, the prevention of health risks for children will become more complex." They urge that these factors must be taken into consideration when discussing whether indoor e-cigarette use should be banned.
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