It was found that no significant group difference was observed between the non-stroke dizziness and stroke patients in the aspects of B cells (12.1 ± 5.54 vs.12.4 ± 5.38, p = 0.995), T cells (64.4 ± 9.25 vs. 65.3 ± 12.72, p = 0.98), CD4+ T cells (37.3 ± 9.77 vs. 39.8 ± 13.55, p = 0.80) and CD8+ T cells (20.6 ± 8.02 vs. 19.3 ± 7.44, p = 0.86, Supplementary Figure 1). This evidence concerns the gene CD4 and stroke disorder.