Study outcomes
PONV, postoperative pain, postoperative nausea and vomiting
SECONDARY
The primary outcome variable was the total amount of fentanyl required in the first 24 postoperative hours. The secondary outcome variables were the time to first ambulation and length of hospitalization after surgery. The postoperative pain score at each time point, the number of rescue analgesic treatments, and the incidence of postoperative nausea and vomiting (PONV) requiring antiemetic medication during the first 24 postoperative hours were also collected.