Fig. 1. Prevalence of HPV infection according to cervical cytology. The prevalence of HR HPVs increases significantly with increasing grade from normal to HSIL (P < 0.001). ASCUS, atypical squamous intraepithelial lesion; LSIL, low-grade squamous intraepithelial lesion; HSIL, high-grade squamous intraepithelial lesion; HPV, human papillomavirus; HR-HPV, high-risk HPV; LR-HPV, low-risk HPV; HR-/LR-HPV, high-risk and low-risk HPV co-infection.

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