Childhood IQ, smoking, and cognitive change from age 11 to 64 years

(Disponible en anglais seulement.)
Present and non-smokers had considerably different mental test scores at 64 years of age, among participants of a Scottish IQ survey. Smoking history was among several independent determinants of mental function at this age. Smoking was an independent negative factor in cognitive aging.
http://dx.doi.org/10.1016/j.addbeh.2004.04.014

Comment: We are all familiar with the damage that smoking can do to one's physical health. This research confirms the effects of smoking on our cognitive abilities.