The propofol dosage required for anesthetic maintenance was @ % ( with a @ % confidence interval , @-@ ) lower in patients given dexmedetomidine ( @ -LSB- @-@ @ -RSB- vs @ -LSB- @-@ @ -RSB- mg/kg/h , P = @ ) , whereas the remifentanil dosage was not significantly different ( @ -LSB- @-@ @ -RSB- vs @ -LSB- @-@ @ -RSB- g/kg/h with P = @ ) .