Risk of Childhood Brain Tumors in Relation to Exposure to Parental Smoking during pregnancy, West Coast Childhood Brain Tumor Study, Born 1978–1990.

aOdds ratio and 95% CI, adjusted for race, sex, age at diagnosis/reference, mother’s education, birth year and center.
bExcludes children exposed to only paternal or other passive smoking.
cOther passive is exposure to tobacco smoke from a household resident other than the father, or at the workplace.
dExcludes children exposed to only maternal or other passive smoking.
eHours per day of exposure from the father only, or from the father and another source.