New research has shown that women who quit smoking had a 21 % lower risk of dying from coronary heart disease within five years of smoking their last cigarette. The risks of dying from other conditions also go down too after quitting but the time frame varies depending on the disease.
The study researcher reported that the harms of smoking were reversible and could decline even to the level of nonsmokers. While it may take over 2o years for some diseases like chronic obstructive pulmonary disease, other disease may be reversed rapidly. They also said it was never early or late to quit smoking.
Smoking being the leading preventable cause of death in the United States causes not only lung cancer but it is also implicated in heart disease, other cancers and respiratory diseases.
World Health Organization has estimated that 3 million people in industrialized countries will have died as a result of tobacco use by 2030, and an additional 7 million people in developing countries.
The research that provided 22 years of data on over 100 000 female participants showed that current smokers had almost triple the risk of overall death compared with women who had never smoked. Current smokers also had a 63 % increased risk for colon cancer while former smokers had a 23% increased risk in comparison to those who never smoked. No association has been found between smoking and ovarian cancer. Women who started earlier in life were at a higher risk for overall mortality from any smoking-related disease. A smoker's overall risk of dying dropped to the level of a never-smoker 20 years after quitting. The overall risk declined 13 percent within the first five years of abstaining.
Most of the excess risk of dying from coronary heart disease vanished within five years of quitting.
However, the risk of developing lung cancer didn't return to normal for 30 years after quitting, although there was a 21% reduction in risk within the first five years compared with women who continued to smoke.
The study shows that quitting smoking is crucial and never too late. It’s been known for years but the researchers are even more convinced now due to this very large and thoroughly done study.