Denson R, Nanson J L, McWatters M A
Can Psychiatr Assoc J. 1975 Apr;20(3):183-7. doi: 10.1177/070674377502000302.
Mothers of methylphenidate-sensitive hyperkinetic children reported smoking two to three times as many cigarettes as the mothers of dyslexic and normal controls; the reported cigarette consumptions of the fathers showed no significant differences. These findings are consistent with the hypothesis that smoking during pregnancy is an important cause of the hyperkinetic syndrome.
