Minimally invasive surgery vs laparotomy in patients with colon cancer residing in high-altitude areas

Table 2 Inflammatory factors before and after surgery in the two groups (mean ± SD)

Time	Group	n	CRP (mg/L)	IL-6 (ng/mL)	TNF-α (pg/mL)
Before Surgery	Minimally invasive group	46	9.18 ± 3.38	122.33 ± 16.19	76.37 ± 11.25
	Laparotomy group	46	8.97 ± 3.60	119.64 ± 18.02	78.62 ± 13.18
	t value		0.288	0.753	0.881
	P value		0.774	0.453	0.381
After Surgery	Minimally invasive group	46	26.98 ± 6.91	146.38 ± 11.23	83.51 ± 8.69
	Laparotomy group	46	41.15 ± 8.39	186.79 ± 15.36	110.65 ± 12.84
	t value		8.842	14.404	11.872
	P value		0.000	0.000	0.000

CRP: C-reactive protein; IL-6: Interleukin-6; TNF-α: Tumor necrosis factor-α.