A Comparison of Oxycodone and Alfentanil in Intravenous Patient-Controlled Analgesia with a Time-Scheduled Decremental Infusion after Laparoscopic Cholecystectomy

Table 3

Incidence rate of postoperative adverse effects.

Incidence of adverse effects	Alfentanil group ()	Oxycodone group ()	value
Dizziness	6 (14.6%)	13 (31.7%)	0.067
Headache	1 (2.4%)	2 (4.9%)	1.000
Respiratory depression	1 (2.4%)	1 (2.4%)	1.000
Pruritus	0 (0%)	1 (2.4%)	1.000
Urinary retention	1 (2.4%)	1 (2.4%)	1.000

Values are expressed as number of patients (percentage). The data were analyzed using Fisher’s exact test and chi-square test. There were no significant differences between two groups ( value < 0.05).