Table 3 Use of rescue analgesics and incidence of adverse effects

Rescue analgesics

 NSAIDs

26 (61.9%)

25 (61.0%)

 > 0.999

 Fentanyl

14 (33.3%)

15 (36.6%)

0.936

Adverse effects

 Respiratory depression

1 (2.4%)

0 (0.0%)

 > 0.999

 Nausea

15 (35.7%)

15 (36.6%)

 > 0.999

 Vomiting

1 (2.4%)

4 (9.8%)

0.202

 Urinary retention

1 (2.4%)

2 (4.9%)

0.616

 Tachycardia

4 (9.5%)

1 (2.4%)

0.360

 Sweating

16 (38.1%)

15 (36.6%)

 > 0.999