Table 2. The comparison of levels of lymphocyte subsets and NK cells between the case group and the control group.

	n	CD8+	CD19+	CD3+	CD4+	NK
Case group	715	29.3 ± 11.6*	3.0 ± 2.7*	69.3 ± 11.9	35.1 ± 10.2	15.1 ± 8.3*
Control group	100	24.7 ± 6.1	13.6 ± 3.9	69.6 ± 10.5	35.7 ± 7.3	17.0 ± 5.2
P value		< 0.001	< 0.001	0.798	0.578	0.026

Note:

^*compared with the control group, P < 0.05. NK, natural killer.