Table 2.

IL-6 concentration in peritoneal lavage fluid of children at the beginning and at the end of laparoscopic and open cholecystectomy.

IL-6 concentration (pg/mL)	Laparoscopic surgery		Open surgery
	At the beginning	At the end	At the beginning	At the end
Median	3.31	10.57	5.90	368.80
Percentiles (25%-75%)	2.02-4.56	3.06-37.98	4.07-19.11	52.39-1007.00
p value∗	p = 0.004		p = 0.001

^∗A p value < 0.05 is considered to show a significant difference between groups (according to Wilcoxon matched pairs test).