In Group SD , the anesthesia onset [ 15 ( 10-25 ) vs. 20 ( 15-30 ) min , p < 0.001 ] and anesthesia related times [ 16.6 ( 10.7-28 .2 ) vs. 22 ( 15.9-33 .7 ) min , p < 0.001 ] were significantly shorter than those of Group S. Additionally , the analgesic requirement was lower in Group SD ( 56.7 vs. 88.5 % , p = 0.009 ) , while among the patients who required analgesic , the first analgesic time was longer in Group SD in comparison to Group S [ 625 ( 347-1764 ) vs. 315 ( 233-746 ) min p < 0.001 ] .