Evidence of an association was found between loss of expression of Ku70 and CIN (χ12=4.77, p=0.029), but none was found for γ-H2AX (χ12=0.23, p=0.63) or ATM (χ12=0.013, p=0.91). This evidence concerns the gene XRCC6 and cervical squamous intraepithelial neoplasia.