The total doses of midazolam ( mg ) , propofol ( mg ) and fentany ( g ) were lower in the slight sedation group than those in the usual sedation group ( 275 85 vs 575 142 , 4 562 1 128 vs 7 434 1 712 and 2 332 1 458 vs 4 124 2 743 , P < 0.05 ) .