From: Effects of patient-controlled analgesia with hydromorphone or sufentanil on postoperative pulmonary complications in patients undergoing thoracic surgery: a quasi-experimental study
Group A (n = 68)
Group B (n = 68)
P value
ICU stay (h)
57.75 ± 13.71
60.48 ± 12.96
0.234
Postoperative stay(d)
9.06 ± 3.38
10.88 ± 7.17
0.186