Indeed, very interesting. Also note that among the adhd population the smokers had a lower HR than the non-smokers. Nicotine is known as a stimulant and to be u

Indeed, very interesting. Also note that among the adhd population the smokers had a lower HR than the non-smokers. Nicotine is known as a stimulant and to be used by undiagnosed adhd patients as self-medication. Would be interesting to see the HR for the smoker split among the medication exposed subgroup.