Follow-up analysis of adolescents partially vaccinated against human papillomavirus

To evaluate factors associated with human papillomavirus vaccination among a cohort of female adolescents previously identified as receiving only one or two doses of vaccine.

This was a 15-month follow-up analysis of a previously identified cohort of 9-18-year-old female adolescents seen in primary clinics within a university-based health system. Vaccine receipt and associated factors were identified by review of administrative records.

Among the 1,714 partially vaccinated female adolescents, 53% eventually completed the vaccination series. There was a wide range of dosing intervals ranging from 31 to 840 days between first and second doses and from 85 to 666 days between second and third doses. Race and insurance type were associated with lower rates of series completion, but not with receiving second doses.

Approximately half of the partially vaccinated girls in our cohort eventually completed the series, albeit often over a longer than recommended interval. There were important disparities in human papillomavirus vaccination.