Group IB Group IB Group GA Group GA p p p
Patient-controlled analgesia (mg) Median(minimum–maximum) Patient-controlled analgesia (mg) Median(minimum–maximum)
Postoperative 0 minute Postoperative 0 minute 0 (0–0) 0 (0–0) 0 (0–1) 0 (0–1) 0.340a 0.340a 0.340a
Postoperative 30 minutes Postoperative 30 minutes 0 (0–0) 0 (0–0) 2 (1–2) 2 (1–2) <0.001a <0.001a <0.001a
Postoperative 3 hours Postoperative 3 hours 0 (0–0) 0 (0–0) 8 (4–10) 8 (4–10) <0.001a <0.001a <0.001a
Postoperative 6 hours Postoperative 6 hours 0 (0–0) 0 (0–0) 14 (7–18) 14 (7–18) <0.001a <0.001a <0.001a
Postoperative 18 hours Postoperative 18 hours 0 (0–0) 0 (0–0) 18 (11–26) 18 (11–26) <0.001a <0.001a <0.001a
Need for additional analgesics n (%)
Postoperative 0 minute 0 (0) 0 (0) 22 (100) 22 (100) <0.001b <0.001b <0.001b
Postoperative 30 minute 0 (0) 0 (0) 6 (27.3) 6 (27.3) 0.022b 0.022b 0.022b
Postoperative 3 hours 0 (0) 0 (0) 21 (95.5) 21 (95.5) <0.001b <0.001b <0.001b
Postoperative 6 hours 0 (0) 0 (0) 11 (50) 11 (50) <0.001b <0.001b <0.001b
Postoperative 18 hours 0 (0) 0 (0) 3 (13.6) 3 (13.6) 0.233b 0.233b 0.233b
aMann–Whitney U test, bChi-square test aMann–Whitney U test, bChi-square test aMann–Whitney U test, bChi-square test aMann–Whitney U test, bChi-square test aMann–Whitney U test, bChi-square test aMann–Whitney U test, bChi-square test aMann–Whitney U test, bChi-square test aMann–Whitney U test, bChi-square test