Clinical effect of laparoscopic radical resection of colorectal cancer based on propensity score matching

Table 5 Comparison of postoperative immune indexes between the two groups

Group	CD4+ (%)		CD8+ (%)		CD4+/CD8+
	Preoperative	24 h after surgery	Preoperative	24 h after surgery	Preoperative	24 h after surgery
Control group (n = 30)	44.80 ± 6.32	32.17 ± 4.78a	27.00 ± 3.46	33.40 ± 3.41a	1.69 ± 0.36	0.97 ± 0.19a
Observation group (n = 30)	44.23 ± 5.74	36.13 ± 4.97a	26.10 ± 4.67	31.53 ± 2.99a	1.76 ± 0.45	1.15 ± 0.18a
t	0.364	3.150	0.848	2.254	0.625	3.736
P value	0.718	0.003	0.400	0.028	0.535	< 0.001

^aP < 0.05, compared with the same group before surgery.

Data are shown as mean ± SD. CD4⁺: CD4-positive T-lymphocytes; CD8⁺: CD8-positive T-lymphocytes.