"Women who smoke into middle-age have three times the death rate of non-smokers and risk dying at least 10 years early, according to adefinitive study of the effects of tobacco in more than a million women in the UK.
The good news, according to the study by a team of Oxford University researchers led by Sir Richard Peto, is that giving up cigarettes before the age of 40 reduces a woman's risk of smoking-related death by 90%. Quitting by 30 reduces it by 97%." - from the Guardian Article.
