There was no statistically significant difference in the proportion of sedative drugs midazolam usage [ 18.4 % ( 52/282 ) vs. 24.8 % ( 65/262 ) , ( 2 ) = 1.151 , P = 0.283 ] and the rate of analgesia success [ 44.3 % ( 125/282 ) vs. 48.9 % ( 128/262 ) , ( 2 ) = 0.571 , P = 0.450 ] and analgesia success [ 16.3 % ( 46/282 ) vs. 15.3 % ( 40/262 ) , ( 2 ) = 0.066 , P = 0.798 ] between sufentanil and fentanyl group .