Impact of minimally invasive surgery on immune function and stress response in gastric cancer patients

Table 5 Comparison of stress response between two groups, mean ± SD

Indicator	Minimally invasive surgery group	Open surgery group	t value	P value
CRP (mg/L)
Preoperative	5.67 ± 0.97	5.71 ± 0.89	0.818	> 0.05
Postoperative 3 d	52.34 ± 1.65a	63.47 ± 1.77a	47.231	< 0.05
IL-6 (pg/mL)
Preoperative	5.73 ± 0.62	5.69 ± 0.58	0.742	> 0.05
Postoperative 3 d	317.78 ± 5.83a	363.14 ± 6.79a	76.897	< 0.05
PCT (ug/L)
Preoperative	0.71 ± 0.87	0.92 ± 1.08	0.546	> 0.05
Postoperative 3 d	52.34 ± 1.65a	3.57 ± 0.38a	16.194	< 0.05

^aP < 0.05 vs the same group.

CRP: C-reactive protein; IL: Interleukin; PCT: Procalcitonin.