Figure 1From: A prospective study of age trends of high-risk human papillomavirus infection in rural China Flowchart of inclusion and exclusion of the study participants. At baseline, 144 women were excluded because of biopsy confirmed CIN2+, with 7397 women in the baseline analysis. 288 of the 2147 baseline screen positives were lost to follow-up and 82 of the 1014 randomly selected baseline screen negatives were lost to follow-up, which added up to 2791 women in the follow-up analysis. CIN2+:cervical intraepithelial neoplasia grade 2 or above.Back to article page