Table 2.

Comparison of immune typing of peripheral blood T lymphocytes in children ($\overline{\chi }$ ± s).

Group	Number of children (cases)	CD3 (%)	CD4 (%)	CD8 (%)	CD4/CD8
Control group	30	67.27 ± 4.91	35.72 ± 3.79	24.45 ± 3.17	1.45 ± 0.18
Severe group	47	54.33 ± 5.26a	20.03 ± 5.14a	21.56 ± 2.91a	0.96 ± 0.22a
Nonsevere group	168	63.82 ± 6.37ab	31.19 ± 3.96ab	23.82 ± 3.40b	1.36 ± 0.21ab
F	—	8.859	9.512	5.228	7.041
P value	—	0.000	0.000	0.002	0.000

Note: Compared with the control group, ^aP < 0.05; compared with the severe group, ^bP < 0.05.