Patients given dexmedetomidine required less propofol ( 1.0 [ 0.7-1 .3 ] vs 1.3 [ 1.0-1 .7 ] mg/kg , P = 0.002 ) and remifentanil ( 1.2 [ 1.0-1 .4 ] vs 1.6 [ 1.1-2 .8 ] g/kg , P = 0.02 ) for anesthetic induction .