Table 2 Postoperative outcomes

 Preoperative

172 [153–192]

172 [157–189]

0.929

 Postoperative 24 h

157 [142–182.5]

171 [162–175]

0.048^*

 Fentanyl, μg

25 [0–50]

25 [0–50]

0.850

 PCA connection time, min

20 [10–30]

20 [10–25]

0.921

 Nausea

3 (7.3%)

5 (11.6%)

0.713

 Vomit

1 (2.4%)

0 (0%)

0.488

 6 h

2/4/8/27

1/4/10/28

0.913

 12 h

1/8/8/24

0/1/8/34

0.043^*

 24 h

3/6/11/21

2/9/7/25

0.574

 36 h

1/6/7/27

0/1/3/39

0.040^*

 48 h

1/3/2/35

1/0/2/40

0.349

0.456

  None

37 (90.2%)

37 (86.0%)

  1

2 (4.9%)

5 (11.6%)

  ≥2

2 (4.9%)

1 (2.3%)

0.134

  None

23 (56.1%)

28 (65.1%)

  1

9 (22.0%)

12 (27.9%)

  ≥2

9 (22.0%)

3 (7.0%)

  Total

24

18

  Nausea or vomiting

20 (83.3%)

15 (83.3%)

0.269

  Dizziness or headache

4 (16.7%)

2 (11.1%)

0.427

  Urinary retention

0

1 (5.6%)

1.000

 Antiemetics, ondansetron, mg^a

4 [4–12]

4 [0–8]

0.049^*

6.1 ± 4.6

4.1 ± 3.1

 Rescue analgesics, paracetamol, g^a

0 [0–1]

0 [0–0]

0.149

0.76 ± 1.24

0.40 ± 0.85

 Rescue analgesics, ketorolac, mg^a

0 [0–0]

0 [0–0]

0.543

6.58 ± 14.25

5.58 ± 15.01

  Headache

8 (19.5%)

6 (14.0%)

0.566

  Dizziness

10 (24.4%)

9 (20.9%)

0.169

  Urinary retention

0 (0%)

2 (4.7%)

0.494

  Dry-mouth

5 (12.2%)

7 (16.3%)

0.183

  Itchiness

0 (0%)

1 (2.3%)

0.493

  Respiratory depression

0 (0%)

0 (0%)

Length of postoperative hospital stay, day

3 [3–4]

3 [3–3]

0.266

Patients’ satisfaction score, 0–10

8 [6–10]

9 [8–10]

0.036^*