Table 3.

Frequency of CD4⁺T cells and CD8⁺T cells and the ratio of CD8⁺T cells/CD4⁺T cells.

	CD4+T cells (%)	CD8+T cells (%)	Ratio of CD8+T cells/CD4+T cells
Control group (n = 5, mean ± SD)	2.83 ± 0.38	2.53 ± 0.18	0.936 ± 0.082
CUMS group (n = 5, mean ± SD)	4.15 ± 0.50∗	1.91 ± 0.11∗∗	0.489 ± 0.066∗∗∗

Frequency of CD4⁺T cells and CD8⁺T cells was measured through immunohistochemistry, and the ratio was calculated. CUMS decreased the frequency of CD8⁺T cells and the ratio of CD8⁺T cells / CD4⁺T cells. ^∗p > 0.05, frequency of CD4⁺T cells, CUMS group vs control group; ^∗∗p < 0.05, frequency of CD8⁺T cells, CUMS group vs control group; ^∗∗∗p < 0.01, the ratio of CD8⁺T cells/CD4⁺T cells, CUMS group vs control group.