No. But that only looks at heavy smokers and duration they stopped, so overselects for old age with higher cancer incidence. This study looks more broadly, not

No. But that only looks at heavy smokers and duration they stopped, so overselects for old age with higher cancer incidence. This study looks more broadly, notably also at onset of smoking: https://jamanetwork.com/journals/jamaoncology/fullarticle/2784990 https://jamanetwork.com/journals/jamaoncology/fullarticle/27... And this is the TL;DR: “ Thus, those who quit smoking at ages 15 to 34, 35 to 44, 45 to 54, and 55 to 64 years avoided an estimated 100%, 89%, 78%, and 56% of the excess cancer mortality risk associated with continued smoking, respectively”