The cohort-specific incidence rates also showed a trend of quick increase for the age group of 40-69 years.
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Lung cancer incidence and mortality in China: Updated statistics and an overview of temporal trends from 2000 to 2016.
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Unlike the increasing trend in China, lung cancer in developed countries such as US showed a decreasing trend since 1990s. 18 , 19 , 20 , 21 Most of the increasing burden of lung cancer in China could be attributed to risk factors such as lifestyle, coal burning, air pollution and smoking, 22 , 23 , 24 and lung cancer may occur decades after exposure to its risk factors.