Patients given dexmedetomidine required less propofol ( @ -LSB- @-@ @ -RSB- vs @ -LSB- @-@ @ -RSB- mg/kg , P = @ ) and remifentanil ( @ -LSB- @-@ @ -RSB- vs @ -LSB- @-@ @ -RSB- g/kg , P = @ ) for anesthetic induction .