According to research published in the journal Tobacco Control (March, 2006), smokers are more likely to be impotent than non smokers. This is based on a survey of 8,000 Australian men between the ages of 16 and 59. Nearly 10% of those surveyed had an impotence problem lasting longer than one month in the previous year. About ¼ of those reporting impotence were smokers (6% smoked a pack or more per day). Men who smoked more than a pack per day were 39% more likely to have some sort of sexual problem.