Table 2.

Total amount of fentanyl use and administration frequency of patient-controlled analgesia

Factor	Group; median (IQR)*		p value
	Control, n = 19	Lidocaine, n = 17†
Fentanyl mean ± SD, μg	2339.26 ± 387.02	1931.65 ± 457.03	0.007
Administration frequency of PCA, no.	76.00 (57.00–96.00)	49.00 (41.00–57.00)	0.003‡
Satisfaction score, 0–10	5.00 (3.00–6.00)	6.00 (4.50–7.00)	0.049‡

IQR = interquartile ratio; PCA = patient-controlled analgesia; SD = standard deviation.

^*Unless otherwise indicated.

^†p < 0.05 compared with the control group.

^‡Mann–Whitney U test.