Smoking Less Drastically Reduces Cancer Risk

  • By Choi Won-woo

    March 14, 2018 13:44

    Smoking fewer cigarettes per day can after all reduce the risk of lung cancer significantly, a study suggests.

    A research team led by Prof. Lee Ki-heon of Seoul National University's Bundang Hospital on Tuesday said they found that the risk of lung cancer dropped by 45 percent if those who smoked 10 to 19 cigarettes a day cut down to fewer than 10. And if men who smoked fewer than 10 cigarettes a day quit completely, their risk of lung cancer dropped by a whopping 71 percent.

    The team analyzed data from the National Health Insurance Service of 143,071 men over 40 who had medical checkups between 2002 and 2005.

    "Studies of the correlation between smoking and cancer risk have mostly targeted Westerners so far," Lee said. "The latest study is significant because it studied only Korean men."

    This study also shows that smoking less reduces the risk of other smoking-related cancers such as nasopharyngeal, esophagus, gastric and colorectal cancer.

    The risk of those cancers fell by 26 percent if men who smoked 10 to 19 cigarettes a day cut down to fewer than 10. The risk of all other cancers not directly correlated to smoking also dropped by 18 percent.

    This study was carried in the recent issue of the Journal of Cancer Research and Treatment.

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