Non-smokers increasingly suffer from lung cancer: what is the reason
Lung cancer is one of the most dangerous types of oncological diseases. It is the fifth most common form of cancer that causes death. At the same time, the number of diagnoses is growing among people who have never smoked, the publication writes People.
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The study, published in the Lancet Respiratory Medicine on February 4 to mark World Cancer Day, analysed lung cancer cases based on data from 2022.
Researchers from the International Agency for Research on Cancer, part of the World Health Organization, found that lung cancer was the fifth-leading cause of cancer deaths worldwide among people who had never smoked. Almost all of those cases were adenocarcinoma, the most common of the disease’s four subtypes among both men and women.
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In 2022, there will be approximately 1,6 million new cases of lung cancer among men and about 910 among women.
The researchers noted that as smoking rates declined in many countries, air pollution became a major factor contributing to these lung cancer cases.
"Air pollution may be an important factor that partly explains the increasing prevalence of adenocarcinoma. It accounts for 53% to 70% of lung cancer cases among never-smokers worldwide," the study said.
As of 2019, almost all of the world's population lives in areas with air quality levels that do not meet standards set by the World Health Organization.
"The results provide insight into how both the disease itself and its associated risk factors are changing, and offer clues about how we can best prevent lung cancer worldwide," said Dr. Freddy Bray, head of cancer surveillance at the International Agency for Research on Cancer and lead author of the study, in a press release.
“Changes in smoking prevalence and air pollution exposure are among the key factors driving the changing lung cancer risk profile by subtype that we see today,” Bray said. “Different trends among men and women across generations provide cancer prevention experts and policymakers with the data they need to design and implement tobacco and air pollution control strategies.”
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Lung cancer is the leading cause of cancer death in the United States. The American Cancer Society estimates that about 2025 new cases of lung cancer will be diagnosed in 226, and nearly 000 people will die from the disease.
Although lung cancer can affect anyone, regardless of age, it is most common in older adults. According to the American Cancer Society, most cases are diagnosed in people 65 years of age and older.
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