Rising cancer rate leads to calls for smoking controls (2)

Lung cancer also accounted for a large proportion of malignant tumors that occurred in residents in 2010. It is not only the most prevalent kind of tumor in male cancer patients, but also the second-most prevalent in female cancer patients, after breast cancer.

"The primary cause for the disease is smoking," said Lei Haichao, the bureau's deputy director.

"More than 90 percent of lung cancer cases are deemed as caused by smoking, including passive smoking. The risk for people who live with smokers to develop lung cancer is 20 to 30 percent higher than those who don't."

According to Zhi Xiuyi, an expert of thoracic surgery at Xuanwu Hospital in Beijing, more people getting annual physical checkups is a reason for the higher incidence rate because more lung cancer cases are being discovered than they were when physical exam was not as popular.

Also, an aging population tends to heighten the incidence rate.

However, he emphasized that smoking, a major cause of the disease, needs to be rooted out.

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