Is ADHD a Precursor to Smoking?

According to the Scripps Howard News Service, children who have attention-deficit hyperactivity disorder are more likely to start smoking. On Oct. 3rd they also reported that those with more ADHD symptoms were at an even higher risk then persons that would smoke regularly during adolescence or early adulthood.
Although more research is needed, it is possible that certain ADHD symptoms may encourage smoking. The study, published in the October 2005 issue of the Archives of General Psychiatry, reported that smokers who had the most inattentive or hyperactive-impulsive symptoms as children, started smoking, on average, a year earlier than those who reported the fewest number of symptoms.