Significantly more EDA patients needed vasopressor treatment perioperatively ( 90 % vs 74 % , P = 0.018 ) , the day of surgery ( 27 % vs 4 % , P < 0.001 ) , and on postoperative day 1 ( 29 % vs 4 % , P < 0.001 ) , whereas no difference in postoperative pain scores was noted .