tokens: There was a significant difference among groups in glucose effectiveness ( F ( 30 ) = 4 . 18 ; P = . 02 ) ( clozapine < olanzapine < risperidone ) with significant differences between clozapine and risperidone ( t ( 30 ) = - 2 . 59 ; P = . 02 ) and olanzapine and risperidone ( t ( 30 ) = - 2 . 34 , P = . 03 ) .