Almost half of all bladder cancers can be attributed to smoking cigarettes, and the risk of bladder cancer has increased significantly for smokers in the past three decades, a new study finds. Smokers now face a four times higher risk of developing bladder cancer than someone who has never smoked. Thirty years ago, that risk was about three times that of never-smokers. Even smokers who’ve quit the habit still face an increased risk -- 2.2 times higher -- than people who’ve never smoked, though the risk lessens with time.
