Philadelphia has high rates of adolescent human papillomavirus (HPV) vaccine series completion. The purpose of this study was to examine factors associated with HPV vaccine series completion in adolescent Philadelphians. A secondary data analysis was conducted using vaccination data from the Philadelphia Immunization Information System. A total of 50,185 participants born between 2000 and 2003, inclusive, received at least 1 dose of HPV vaccine before 8/31/2015. Series completion was defined by receipt of at least 3 doses of HPV vaccine. Only 49.9% of females and 45.1% of males completed the HPV vaccine series. Multivariable logistic regression analysis showed that for females, Hispanic (OR 1.41, 95% CI 1.28, 1.56) and Asian (OR 1.76, 95% CI 1.53, 2.03) race/ethnicity were associated with series completion when accounting for differences in income and age. Lower-income females were less likely to complete the series than high-income females (≤100% Federal Poverty Guidelines, Family of [FPG]: OR 0.86, 95% CI 0.77, 0.95; 101-150% FPG: OR 0.82, 95% CI 0.75, 0.90; 151-200% FPG: OR 0.90, 95% CI 0.82-0.98). Hispanic (OR 1.42, 95% CI 1.28, 1.58) and Asian (OR 1.72, 95% CI 1.48, 2.00) males were more likely than white males to complete the series. For males, only the 101-150% FPG income category was associated with a different completion rate (OR 0.87, 95% CI 0.79, 0.96) than the >200% FPG income category. These results indicate that Hispanic and Asian race/ethnicity are predictors of HPV vaccine series completion in Philadelphia adolescents. Lower-income Philadelphia females, and some low-income males, are less likely to complete the series than higher-income adolescents. Efforts to improve series completion should aim at improving rates in African American and white adolescents and in low-income girls.
Youngdahl, Karie, "Predictors of Human Papilloma Virus Vaccination Series Completion in Philadelphia Adolescents" (2016). Master of Public Health Capstone Presentations. Presentation 190.