Summary of selected characteristics of three RCT reports and two post-RCT follow-on cohort studies contributing to a meta-analysis.

*In accordance with local regulatory and ethical requirements, an exclusion criterion for number of lifetime sexual partners was not applied in Finland. As a result, a proportion of 16–17 year old Finnish girls had more than 4,[14], [20] 5,[1] or 6 [19] lifetime partners.
**The post-PATRICIA trial cohort study did not publish the median lifetime number of sexual partners of study participants.[19] Data regarding the number of sexual partners in the past 12 months (at baseline) was available; the median number of sexual partners in the past year was 1 in both the vaccine and control group arms of the study.
***Women from the HPV-16 monovalent vaccine trial did not contribute to analysis of HPV-18 related endpoints.[22].
****Lifetime number of sexual partners was not an inclusion or exclusion criterion.[15].