Predictors of HPV vaccination in the southern US: A survey of caregivers from 13 states

Abstract

Background and objectives: Despite a high burden of human papillomavirus (HPV)-attributable cancers, the southern US lags other regions in HPV vaccination coverage. This study sought to characterize and contextualize predictors of HPV vaccination in the southern US.

Methods: From December 2019 - January 2020, parents of adolescents (ages 9-17 years) living in thirteen southern US states were recruited from a nationally-representative online survey panel and completed a cross-sectional survey. The primary study outcome was initiation of HPV vaccination.

Results: Of 1105 parents who responded to the survey, most were ≥35 years of age and of female gender. HPV vaccination initiation was reported only among 37.3% of adolescents and was highest at age 12. Cumulative HPV vaccination coverage was highest at age 15 (60%) but lower than coverage for tetanus-diphtheria-acellular pertussis (Tdap, 79.3%) and Meningococcal vaccines (MenACWY, 67.3%). Provider recommendation was strongly associated with higher odds of HPV vaccination (aOR: 49.9, 95 %CI: 23.1-107.5). In alternative predictive models, home/online (vs. public) schooling and parents' working status were associated with lower odds of vaccination; health care visits in the past 12 months and shorter travel times to adolescents' usual health care provider were associated with greater odds of vaccination.

Conclusions: Our findings suggest missed opportunities for HPV vaccination in the southern US and support strengthening provider recommendation for on-time initiation of HPV vaccination among adolescents. Other strategies to increase HPV vaccinations may include encouraging co-administration with other adolescent vaccines, increasing vaccine access, and promoting vaccinations for home/online-school students.

Keywords: Adolescents; Human Papillomavirus; Immunization; Provider recommendation; Southern United States.