Table 1.

Subjects

GroupnMean IQ (range)Sex (W, M)Mean age (range)Smokers (n)
LT91003, 6343
(82–120)(17–52)
RT12 998, 4372
(78–128)(22–56)
C15*4, 11304
(22–41)
  • * IQ testing was not performed on control subjects. LT, Left temporal; RT, right temporal; C, control.