Table 3.

Comparison of the content of immune cells in peripheral blood at different postoperative intervals.

Group	Time	CD4+T cells	CD8+T cells	NKT cells
Observation group(n = 41)	Before operation	43.78 ± 6.04	38.02 ± 5.62	1.22 ± 0.18
	7 days after operation	30.22 ± 3.59∗#	27.55 ± 3.26∗#	0.79 ± 0.08∗#
	14 days after operation	31.27 ± 4.49∗#	29.01 ± 3.47∗#	0.86 ± 0.11∗#
	21 days after operation	33.54 ± 4.49∗#	31.22 ± 3.59∗#	0.91 ± 0.19∗#
Control group (n = 46)	Before operation	43.16 ± 5.96	37.58 ± 5.29	1.19 ± 0.18
	7 days after operation	35.62 ± 4.48∗	31.04 ± 4.59∗	0.82 ± 0.13∗
	14 days after operation	37.42 ± 5.53∗	33.55 ± 5.08∗	1.05 ± 0.16∗
	21 days after operation	39.73 ± 6.17∗	35.27 ± 5.64∗	1.13 ± 0.17∗

Values are presented as mean ± SD. ^∗P < 0.05 vs. before operation; ^#P < 0.05 vs. control group.