Propofol ( 2.4 [ 1.9 to 3.3 ] vs. 1.7 [ 1.2 to 2.8 ] mg/kg ) and remifentanil ( 2.3 [ 2.0 to 3.0 ] vs. 2.5 [ 1.2 to 4.3 ] g/kg ) consumptions were similar in auto versus manual groups during induction , respectively .