Table 3.

Variation of serum IL-6 (pg/ml) and CRP (mg/L) levels after operation.

		Endoscopic group	Conventional group	P-value
IL-6	Before operation	1.65 (0.99–2.80)	2.66 (1.58–3.60)
	2 h after operation	4.31 (2.47–6.43)*	5.21 (2.66–10.40)*	.420
	12 h after operation	4.98 (3.37–8.11)*	8.53 (4.70–13.32)*	.085
	24 h after operation	5.42 (2.95–8.39)*	12.2 (8.44–26.81)*	.003
	48 h after operation	4.32 (3.14–10.87)*	9.21 (4.62–17.99)*	.042
CRP	Before operation	3.19 (3.10–3.19)	3.21 (3.00–3.28)
	2 h after operation	3.22 (3.08–3.30)	3.24 (3.11–3.33)	.949
	12 h after operation	3.25 (3.20–4.41)	3.28 (3.00–4.51)	.851
	24 h after operation	5.07 (3.19–8.03)*	11.10 (3.64–22.10)*	.030
	48 h after operation	5.92 (3.19–13.90)*	27.60 (15.60–66.00)∗*	.001

All data are expressed in median (P₂₅–P₇₅).

The difference in serum IL-6 and CRP levels between the two groups was analyzed with Wilcoxon rank sum test.

*P < .05, comparing with the preoperative value. The difference in postoperative serum IL-6 and CRP levels in both groups was analyzed with Friedman M test and q test.