Associations Between Early Low-Level Tobacco Smoke Exposure and Executive Function at Age 8 Years

To investigate whether exposure to tobacco smoke during early brain development is linked with later problems in behavior and executive function.We studied 239 children in a prospective birth cohort. We measured tobacco exposures by caregiver report and serum cotinine 3 times during pregnancy and 4 times during childhood. We used linear regression to examine the association between prenatal and childhood serum cotinine concentrations and...