Quantitative comparison of methylation of (A) PAX1 and (B) LMX1A in the cervical exfoliated cells among different groups. PAX1, paired box gene 1; LMX1A, LIM homeobox transcription factor 1 α; SD, standard deviation. NC, negative control; LSIL, low-grade squamous intraepithelial lesion; HSIL, high-grade squamous intraepithelial lesion; CSCC, cervical squamous-cell carcinoma.