tokens: Fasting serum insulin concentrations differed among groups ( F ( 33 ) = 3 . 35 ; P = . 047 ) ( clozapine > olanzapine > risperidone ) with significant differences between clozapine and risperidone ( t ( 33 ) = 2 . 32 ; P = . 03 ) and olanzapine and risperidone ( t ( 33 ) = 2 . 15 ; P = . 04 ) .