Nested case-control analysis observed a positive relationship between CD4,CD8 levels, and risk of CIN progression (CD4 OR = 0.34,[0.13, 0.94];CD8 OR = 0.27, [0.09, 0.79]),and an opposite relationship between IL-10 levels and risk of CIN progression (OR = 2.92, [1.09, 7.84]). Here, CD4 is linked to cervical squamous intraepithelial neoplasia.