Table 2.

Intraoperative data.

	Non-ESPB group (n = 27)	ESPB group (n = 26)	P value
Intraoperative findings
Inflammation grade (1/2/3)*	9/16/2	14/8/4	0.111
Gallbladder bed injury (1/2/3)**	25/2/0	25/1/0	1.000
Duration of operation (min)	27.0 ± 10.2	28.8 ± 12.6	0.551
Intraoperative remifentanil use (μg/min/kg)	0.073 ± 0.017	0.063 ± 0.015	0.024
Difference between maximum value and baseline vital signs
Mean blood pressure (mmHg)	−1.1 ± 3.9	0.2 ± 2.7	0.144
Heart rate (beats/min)	−1.0 (−1.0–0.5)	−1.0 (−3.0–0.0)	0.110

Data presented as n (%) the mean(±SD) or median (interquartile range) for continuous variables, or absolute number for categorical variables, as appropriate.

*Evaluated by Parkland grading method.

**Evaluated by operating surgeon as follows: 1. Insignificant injury to liver, 2. Mild injury to liver 3. Moderate injury to liver.