Fig. 2.

Difference in cytological findings after 6 months in the active and control arm. Shadings illustrate different cytological changes. Dark grey, remission to non-conspicuous finding or regression to a lower grade. Grey, persistence. Light grey, progression to a higher grade. NILM, negative for intraepithelial lesion or malignancy; ASC-US, atypical squamous cells of undetermined significance; AGC, atypical glandular cells; ASC–H, atypical squamous cells cannot exclude HSIL; LSIL, low-grade squamous intraepithelial lesion; HSIL, high-grade squamous intraepithelial lesion. *Fisher’s two-tailed exact test and Pearson’s chi-squared test; p < 0.001