"Messages concerning the effect of smoking on disability and quality of life may be more likely to invoke changes in smoking behavior than are messages about loss of life years," the study authors wrote.
More positive news comes from a 50-year study following 34,439 male doctors published in 2004. In the British Medical Journal researchers found that when people quit smoking by age 30 it reduced almost all risk associated with smoking. Also that quitting by age 50 cut risk in half.
"The findings of the benefit of giving up at different ages were not surprising for us," says lead author Sir Richard Doll, an emeritus professor of medicine at Oxford University in England, who published the first paper confirming the link between smoking and lung cancer. "But we had not previously shown them so clearly."
The British study also found that smoking from youth nearly triples the death rate from all causes, including lung cancer, chronic obstructive pulmonary disease and heart disease and stroke. "Regular cigarette smoking deprives people, on average, of 10 years of life," Doll says. "Some people, of course, losing much more and other less."
The heartening news for smokers, however, is that it’s never too late to achieve health benefits from quitting.