Quitting Smoking May Double Cancer Survival

Many lung cancer patients who lived 5 years had stopped, researchers say

LONDON - People with early lung cancer who quit smoking could double their chances of surviving, a new study says.

Until now, there has been little proof that quitting smoking after developing lung cancer makes any difference to survival.

Lung cancer is the top cancer worldwide, and the prognosis is usually poor. Only about 7 percent of patients make it to five years, though about 20 percent of patients are diagnosed early enough to be treated.

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