Study: Quitting Cigarettes Improves Lung Health, Smoking Fewer Of Them Does Nothing

If you’re thinking about cutting back on smoking cigarettes you should know you might as well go all the way and quit completely. Researchers analyzed 30 years of data from 3,140 participants in the Coronary Artery Risk Development in Young Adults (CARDIA) study. They found that heavy smokers who had quit had lesser odds of suffering from lung disease than light smokers, but those who continued to smoke ten cigarettes per day were more likely to develop emphysema than those who used to smoke 20 cigarettes per day or more and have since stopped completely. Light smokers also suffer a larger decrease in lung function than those who have quit, regardless of how long they smoked for previously.