A study presented by Canadian researchers at the University of Ottawa on October 3, 2011 revealed that not only do smokers have triple the chance of suffering strokes than non-smokers, but that they are likely to occur nine years earlier.

http://zeenews.india.com/news/health/diseases/smokers-three-times-more-likely-to-suffer-stroke_14021.html
http://www.dailymail.co.uk/health/article-2044617/Strokes-hit-years-earlier-youre-smoker.html?ito=feeds-newsxml