Figure 1:

Flow diagram for population selection. *At least 1 dose of human papillomavirus (HPV) vaccine before first Pap test. †No recorded dose of HPV vaccine before first Pap test. ‡Unadjusted screening rate of vaccinated/unvaccinated cohort. §Negative cytology result. ¶Includes the following cytology results: atypical squamous cells of undetermined significance; low-grade squamous intraepithelial lesion; atypical squamous cells, cannot rule out a high-grade lesion; and high-grade squamous intraepithelial lesion.