A multilevel analysis of factors influencing the inaccuracy of parental reports of adolescent HPV vaccination status

State and territory immunization program activities and their association with human papillomavirus vaccine initiation in the United States of America: A multilevel approach

This study evaluates the association between immunization program (IP) activities aimed at increasing HPV vaccination among adolescents and their impact on initiation rates. Our data sources are: (i) 2016 AIM Annual Survey and (ii) 2019 National Immunization Survey-Teen. We estimated the prevalence of HPV vaccine initiation using a multilevel Poisson model, combining state-level IP data and individual characteristics of adolescents. We calculated the prevalence ratio (PR) of HPV initiation among adolescents to compare the effects of IP activities, adjusting for state of residence, age, sex, maternal education, and ethnicity. A total of 17,390 teens aged 13 and 17 were evaluated. States with publicly available school-based adolescent coverage rates and/or exemptions (PRw, activity Dadjusted: 1.08, 95% CI: 1.02, 1.14), and those that expanded the number of pharmacies entering HPV vaccination data (PRw, activity Nadjusted; 1.06, 95% CI: 1.02, 1.10) in Immunization Information Systems (IIS), had higher HPV vaccine initiation rates compared to states that did not implement these strategies. When stratifying, these findings were present in the younger group (13-15 years, PRw, activity D adjusted: 1.10, 95% CI: 1.01, 1.18; PRw. activity N adjusted: 1.10, 95% CI: 1.05, 1.16), but not in the older group (16-17 years, PRw, activity D adjusted: 1.05, 95% CI: 0.95, 1.15; PRw. activity N adjusted: 1.00, 95% CI: 0.94, 1.06). States that expanded the number of school-located programs entering HPV vaccine records in IIS (PRw, activity Eadjusted: 1.08, 95% CI: 1.01, 1.15) had higher vaccine initiation prevalence in the younger group but not in the older group. Limitations include a lack of operational definitions for IP activities, potential biases in the NIS-Teen survey, and reliance on provider-reported HPV vaccination. Nonetheless, these results highlight immunization activities that support national efforts to increase HPV vaccine uptake and inform public health programs on effective HPV vaccine promotion.

The effects of health beliefs and acculturation on the acceptance of human papillomavirus vaccination among Asian Indian parents in the United States

BACKGROUND

The available limited literature and Centers for Disease Control data suggest that human papillomavirus (HPV) vaccination acceptance is lower among Asian Indians than the general population in the United States.

PURPOSE

The purpose of the study was to determine the effects of health beliefs, subjective norms, acculturation, and demographics on HPV vaccination acceptance among Asian Indian parents.

METHODOLOGY

Using a comparative descriptive cross-sectional study design, immigrant and first-generation Asian Indian parents of 9- to 16-year-old children were recruited ( N = 171). The survey comprised the Health Belief and Subjective Norms instrument and the Suinn-Lew Asian Self-Identity Acculturation Scale. The analysis included parametric and nonparametric tests.

RESULTS

Participants who expressed higher levels of perceived barriers were less likely to accept HPV vaccination (odds ratio [OR] = 0.47, p = .016). Spousal opinion negatively correlated with HPV vaccination acceptance (OR = 0.57, p = .006). However, subjective norms positively predicted HPV vaccination acceptance (OR = 1.69, p = .039). Participants who perceived that friends and family approved of the vaccination also had significantly higher rates of vaccination acceptance (OR = 11.99, p = .001).

CONCLUSIONS

The results revealed unique factors in the acceptance of HPV vaccination in Asian Indians that were not examined or understood before. The applied Health Beliefs and Subjective Norms theoretical framework suggested that perceived barriers, subjective norms, and the opinions of spouses, friends, and family predicted HPV vaccination acceptance.

IMPLICATIONS

Educational interventions targeting providers, spouses, family, and community members with influential effects on parents may positively affect HPV vaccination acceptance. Providers should note that this population welcomes the provider's recommendations.

Sexual Behaviors and Human Papillomavirus Vaccination in a Heterosexually Active Adult Population at Increased Risk for HIV Infection

Human papillomavirus (HPV) is the most common sexually acquired infection in the US. Vaccination is effective against infection with high-risk HPV strains, yet HPV vaccine coverage is lower in the US than the national target. This study aimed to determine the relationship between sexual behaviors and HPV vaccination in a heterosexually active population at increased risk for HIV infection. Data from 380 participants aged 18-45 years obtained from the National HIV Behavioral Surveillance system increased risk heterosexuals cycle 5 (2019) in Houston, Texas, was analyzed. RDS-Analyst was used to generate population-based descriptive statistics. Modified Poisson regression models clustered on recruitment chain were conducted in SAS 9.4 to assess the relationship between sexual behaviors and HPV vaccination. Only 11.5% of participants had received at least one dose of the HPV vaccine. Regarding behaviors within the past 12 months, 44.8% reported having condomless casual sex, 51.3% reported having concurrent sexual partnerships while in their most recent relationship, 14.5% reported exchanging sex, and participants had an average of 4-5 sex partners. Further, those who exchanged sex had a significantly lower prevalence of HPV vaccine uptake when compared to those who did not exchange sex (adjusted prevalence ratio 0.23; confidence interval 0.10-0.52), while all other measures of sexual behavior were not significantly associated with HPV vaccination. More research is needed to understand the relationship between exchange sex and low prevalence of vaccination, specifically in women who bear the highest burden of poor HPV-related morbidity and mortality.

Awareness of human papillomavirus and reported human papillomavirus vaccine uptake in a high-risk population

Introduction

Disparities in human papillomavirus (HPV) awareness and HPV vaccine uptake are likely exacerbated among racial/ethnic minority populations living in low-income areas. This study aims to determine the prevalence and correlates of HPV awareness and HPV vaccine uptake in an urban, low-income, racial/ethnic minority population.

Methods

Secondary data analyses were performed in 2021 using 380 participants aged 18-45 years from the 2019 National HIV Behavioral Surveillance for high-risk heterosexuals, which monitors HIV risk behaviors among individuals living in high-poverty, high HIV prevalence neighborhoods. Prevalence estimates and modified Poisson regression models were used to assess the relationship between HPV awareness and HPV vaccine uptake, and sociodemographic characteristics.

Results

Only 53% of participants had heard of HPV and 11.5% had received at least one dose of the HPV vaccine. Those who were female, non-Hispanic White or other, had public health insurance, lived above the federal poverty level, had experienced homelessness and incarceration, and had usual source of healthcare showed higher awareness of HPV while those who were younger, female, non-Hispanic White or other, recently incarcerated, had a usual source of healthcare, and had a healthcare encounter in the past year showed higher prevalence of HPV vaccine uptake.

Conclusions

Prevalence of HPV vaccination in this high-risk population was low and there was a lack of preventive care utilization. Further research is needed on how to effectively target these populations to not only increase vaccine uptake, but to mitigate barriers that contribute to low awareness and suboptimal vaccination uptake in high-risk heterosexual populations.

Exploring Preventive Healthcare in a High-Risk Vulnerable Population

This study describes preventive care behaviors and explores opportunities to deliver preventive sexual healthcare to a high-risk vulnerable population. Data from the National HIV Behavioral Surveillance (NHBS) system high-risk heterosexuals (HET) cycle (2019) in Houston, Texas, was used to describe preventive care utilization and assess the relationship between healthcare utilization and sociodemographic characteristics. More than 47% reported having no usual source of healthcare, and 94.6% reported receiving no non-HIV STI testing in the past 12 months. Additionally, many sociodemographic factors were associated with healthcare utilization and having a usual source of healthcare. Future efforts should be targeted at increasing preventive healthcare utilization among high-risk vulnerable populations as well as implementing more preventive sexual healthcare services in the community health centers where these populations most frequently encounter healthcare.

The impact of publicly funded immunization programs on human papillomavirus vaccination in boys and girls: An observational study

Background

Reaching and maintaining high global human papillomavirus (HPV) vaccine uptake has been challenging. The impact of publicly funded HPV immunization programs and the interplay of sociodemographic, psychosocial and policy factors in maximizing vaccination is poorly understood. This observational study examined the impact of introducing publicly funded school-based HPV vaccination programs for boys directly on uptake in boys and indirectly on uptake in girls, while concurrently examining other important sociodemographic and psychosocial factors.

Methods

Data were collected from a national, longitudinal sample of Canadian parents of children aged 9-16 years during August-September 2016 (T1) and June-July 2017 (T2). Participants completed an online questionnaire measuring sociodemographic characteristics, vaccine knowledge and attitudes, health care provider recommendation, and HPV vaccine uptake. Analyses were conducted separately for parents of boys and girls using logistic regression analyses at T1 and T2. Jurisdictions with HPV vaccine funding for boys at both time-points were compared to those with funding at neither time-points and those that introduced funding between time-points.

Findings

The sample included parents of boys (n = 716) and girls (n = 843). In multivariable analyses, jurisdictions with funding for boys at both time-points had higher odds of vaccination (adjusted odds ratio, T1 = 10.18, T2 = 11.42; 95% confidence interval, T1 = 3.08-33.58, T2 = 5.61-23.23) than jurisdictions without funding at both time-points; however, funded jurisdictions did not have higher odds of vaccination compared to jurisdictions that newly introduced funding for boys. Vaccination was associated with consistent determinants in boys and girls including child's age, health care provider recommendation, perceived vaccine harms, and perceived vaccine affordability.

Interpretation

This gender-sensitive analysis highlights the interplay of sociodemographic, psychosocial, and policy factors that can improve HPV vaccination. Publicly funded school-based programs are an impactful strategy to increase vaccine uptake.

Funding

This work was supported by the Canadian Cancer Society Research Institute (#704,036). GKS was supported by the Vanier Canada Graduate Scholarship and Queen Elizabeth II Diamond Jubilee Scholarship programs. The funders of this work had no role in the data collection, analysis, or interpretation, or any aspect pertinent to the study.

U.S. Vietnamese parents' HPV vaccine decision-making for their adolescents: an exploration of practice-, provider-, and patient-level influences

U.S. Vietnamese have high cervical cancer incidence and low human papillomavirus (HPV) vaccine initiation. Using the P3 model, we explored practice-, provider-, and patient-level determinants of U.S. Vietnamese parents’ HPV vaccine decision-making for their adolescents. We conducted a cross-sectional, online survey (04/2020–12/2020) with U.S. Vietnamese parents who had ≥ 1 adolescent ages 9–18. We assessed HPV vaccination outcomes (initiation, willingness to initiate, completion) and provider recommendation. Modified Poisson regressions were used to identify practice-, provider- and patient-level correlates of outcomes. The sample (n = 408) was 44 years old on average; 83% were female and 85% had a Bachelor’s degree. Around half of adolescents were female (51%) and 13–18 year old (54%). Only 41 and 23% of parents had initiated and completed the HPV vaccine series for their child, respectively. Initiation was associated with receiving provider recommendation (either low- or high-quality), while willingness to initiate was associated with receiving high-quality recommendation. Both initiation and willingness to initiate was negatively associated with parental perception that their child was too young for a “sexually transmitted infection (STI)-preventing vaccine.” Provider recommendation was associated with higher parental U.S. acculturation and the child being older and female. Provider-facing interventions should promote high-quality, age-based, gender-neutral HPV vaccine recommendation. These and population- and individual-facing interventions should recognize the need for additional parental education, particularly related to misconceptions regarding STI prevention.

Determinants of HPV-vaccination uptake and subgroups with a lower uptake in the Netherlands

Background

In the Netherlands, the HPV-vaccine uptake was 52% during the 2009 catch-up campaign (birth cohorts 1993–1996). This increased to 61% in the regular immunization program (birth cohorts 2000–2001). However for birth cohorts 2003–2004 the uptake declined to 45.5%. With this study we aimed to gain insight into social, economic and cultural determinants that are associated with HPV-vaccination uptake and which subgroups with a lower HPV-vaccination uptake can be identified. In addition, we investigated whether the influence of these factors changed over time.

Methods

To study the determinants of HPV-vaccine uptake we performed a database study using different aggregation levels, i.e. individual level, postal code level and municipality level. All Dutch girls who were invited for HPV-vaccination through the National Immunization Program in the years 2012, 2014 and 2017 (i.e. birth cohorts 1999, 2001 and 2004, respectively) were included in the study population. We conducted multilevel logistic regression analyses to analyze the influence of the determinants on HPV-vaccination uptake, taking into account that the delivery of HPV-vaccine was nested within municipalities.

Results

Results showed that in particular having not received a MMR-vaccination, having one or two parents born in Morocco or Turkey, living in an area with lower socioeconomic status and higher municipal voting proportions for Christian political parties or populist parties with liberal-conservative views were associated with a lower HPV-vaccination uptake. Besides some changes in political preferences of the population and changes in the association between HPV uptake and urbanization level we found no clear determinants which could possibly explain the decrease in the HPV-vaccination uptake.

Conclusions

In this study we identified current social, economic and cultural determinants that are associated with HPV-vaccination uptake and which low-vaccination subgroups can be identified. However, no clear determinants were found which could explain the decrease in the HPV-vaccination uptake. Tailored information and/or consultation for groups that are associated with a lower HPV-vaccination uptake might help to increase the HPV-vaccination uptake in the future.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-021-11897-0.

Maternal Self-Report of Tetanus Diphtheria Pertussis Vaccination during Pregnancy Correlates with Patient-Specific Electronic Medical Records

OBJECTIVES

To evaluate the concordance between maternal report of antepartum tetanus, diphtheria, pertussis (Tdap) vaccination and vaccination status documented in the electronic medical record (EMR), as well as factors associated with discordance.

STUDY DESIGN

A survey was completed by a convenience sample of postpartum patients in a New York metropolitan hospital. The survey collected patients' demographic information, health beliefs, and whether they received Tdap vaccine during this pregnancy. The patient's Tdap vaccination status was abstracted from the EMR, a combination of data gathered from the obstetrician and patient's hospital record. Kappa statistics measured the agreement between maternal report and EMR on antepartum Tdap vaccination. Univariate and multivariable logistic regression analyses were performed to identify maternal characteristics associated with discordance.

RESULTS

Of the 1571 patients with Tdap status available in the EMR, 1549 patients (92%) reported on receipt status for Tdap vaccination during pregnancy; 1328 maternal reports (86%) agreed with the EMR for Tdap status (kappa = 0.72, 95% CI 0.68-0.75). Several factors were statistically significant in multivariable analyses: lower income was associated with greater discordance (ie, overreporting; P = .02), as well as certain health beliefs including "Pregnant women should be concerned about the possibility of pertussis in their babies" (aOR 2.86, 95% CI 1.02-8.04) and "My friends would probably think getting a Tdap vaccine is a good idea" (aOR 2.36, 95% CI 1.11-4.99).

CONCLUSIONS

Maternal recall of Tdap vaccination during pregnancy is consistent with the EMR. This supports the value of maternal report in determining Tdap vaccination status, which is especially important when vaccination records are not available.

Practice-, provider- and patient-level facilitators of and barriers to HPV vaccine promotion and uptake in Georgia: a qualitative study of healthcare providers' perspectives

Georgia experiences higher human papillomavirus (HPV)-associated cancer burden and lower HPV vaccine uptake compared with national estimates. Using the P3 model that concomitantly assesses practice-, provider- and patient-level factors influencing health behaviors, we examined facilitators of and barriers to HPV vaccine promotion and uptake in Georgia. In 2018, we conducted six focus groups with 55 providers. Questions focused on multilevel facilitators of and barriers to HPV vaccine promotion and uptake. Our analysis was guided by the P3 model and a deductive coding approach. We found that practice-level influences included organizational priorities of vaccinations, appointment scheduling, immunization registries/records, vaccine availability and coordination with community resources. Provider-level influences included time constraints, role, vaccine knowledge, self-efficacy to discuss HPV vaccine and vaccine confidence. Patient-level influences included trust, experiences with vaccine-preventable diseases, perceived high costs, perceived side effects and concerns with sexual activity. Findings suggest that interventions include incentives to boost vaccine rates and incorporate appointment scheduling technology. An emphasis should be placed on the use of immunization registries, improving across-practice information exchange, and providing education for providers on HPV vaccine. Patient-provider communication and trust emerge as intervention targets. Providers should be trained in addressing patient concerns related to costs, side effects and sexual activity.

Barriers to Human Papillomavirus Vaccine Uptake Among Racial/Ethnic Minorities: a Systematic Review

BACKGROUND

Human papillomavirus (HPV) is associated with poor health outcomes, including cervical cancer. Racial/ethnic minority populations experience poor health outcomes associated with HPV at higher rates. A vaccine is available to protect against HPV infections and prevent HPV-related sequelae; however, vaccination rates have remained low in the United States (U.S.) population. Thus, there is an urgent need to increase the HPV vaccination rate. Moreover, little is known about barriers to HPV vaccination in racial/ethnic minority groups. This paper highlights the most recent findings on barriers experienced by these groups.

METHODS

The PubMed database was searched on July 30, 2020, for peer-reviewed articles and abstracts that had been published in English from July 2010 to July 2020 and covered racial/ethnic disparities in HPV vaccination.

RESULTS

Similar findings were observed among the articles reviewed. The low HPV vaccination initiation and completion rates among racial/ethnic minority populations were found to be associated with lack of provider recommendations, inadequate knowledge and awareness of HPV and HPV vaccination, medical mistrust, and safety concerns.

CONCLUSIONS

Provider recommendations and accurate distribution of information must be increased and targeted to racial/ethnic minority populations in order to bolster the rate of vaccine uptake. To effectively target these communities, multi-level interventions need to be established. Further, research to understand the barriers that may affect unvaccinated adults in the catch-up age range, including males, may be beneficial, as majority of the previous studies focused on either parents of adolescents or women.

An innovative housing-related measure for individual socioeconomic status and human papillomavirus vaccination coverage: A population-based cross-sectional study

BACKGROUND

Human papillomavirus (HPV) is a known cause of anogenital (eg, cervical) and oropharyngeal cancers. Despite availability of effective HPV vaccines, US vaccination-completion rates remain low. Evidence is conflicting regarding the association of socioeconomic status (SES) and HPV vaccination rates. We assessed the association between SES, defined by an individual validated Housing-based Index of Socioeconomic Status (HOUSES), and HPV vaccination status.

METHODS

We conducted a cross-sectional study of children/adolescents 9-17 years as of December 31, 2016, living in southeastern Minnesota by using a health-record linkage system to identify study-eligible children/adolescents, vaccination dates, and home addresses matched to HOUSES data. We analyzed the relationship between HPV vaccination status and HOUSES using multivariable Poisson regression models stratifying by age, sex, race, ethnicity, and county.

RESULTS

Of 20,087 study-eligible children/adolescents, 19,363 (96.4%) were geocoded and HOUSES measures determined. In this cohort, 57.9% did not receive HPV vaccination, 15.8% initiated (only), and 26.3% completed the series. HPV vaccination-initiation and completion rates increased over higher SES HOUSES quartiles (P < .001). Rates of HPV vaccination initiation versus unvaccinated increased across HOUSES quartiles in multivariable analysis adjusted for age, sex, race, ethnicity, and county (1st quartile, referent; 2nd quartile, 0.97 [0.87-1.09]; 3rd quartile, 1.05 [0.94-1.17]; 4th quartile, 1.15 [1.03-1.28]; test for trend, P = .002). HOUSES was a stronger predictor of HPV vaccination completion versus unvaccinated (1st quartile referent; 2nd quartile, 1.06 [0.96-1.16]; 3rd quartile, 1.12 [1.03-1.23]; 4th quartile, 1.32 [1.21-1.44]; test for trend, P < .001). Significant interactions were shown for HPV vaccination initiation by HOUSES for sex (P = .009) and age (P = .006).

CONCLUSION

The study showed disparities in HPV vaccination by SES, with the highest HOUSES quartiles associated with increased rates of initiating and even greater likelihood of completing the series. HOUSES data may be used to target and tailor HPV vaccination interventions to undervaccinated populations.

Human papillomavirus vaccination among diverse college students in the state of Georgia: who receives recommendation, who initiates and what are the reasons?

Young adulthood is a critical time for catch-up HPV vaccination. We assessed predictors of vaccine recommendation and initiation among college students. We analysed cross-sectional surveys from 2397 students using multivariable logistic regressions. Guided by the Socio-ecological and Health Belief Models, measures included socio-demographic characteristics, intrapersonal measures (e.g. vaccine beliefs), interpersonal measures (e.g. doctor's recommendation) and institutional-level measures (e.g. college settings). The sample included students from private, public, technical and historically black colleges/universities. Of the sample, 64.5% were White; additionally, 48.3% of women (n = 750/1552) and 18.8% of men (n = 159/845) received a doctor's recommendation. Among women, predictors included older age, US-born, higher parental education and attending private schools. Among men, predictors included younger age, being homosexual and attending private schools. HPV vaccine series initiation was low-43.3% of women (n = 672) and 16.7% of men (n = 141). Doctor's recommendation predicted initiation for both sexes. Younger women, women attending technical colleges and men of 'multiple/other' race had lower odds of initiation. Common initiation barriers for both sexes included a lack of doctor recommendation and sexual inactivity. These barriers and the associations between nativity, race and socio-economic status with vaccine recommendation and initiation should be further investigated. Interventions should improve patient-provider communication around HPV vaccine.

Disparities and reverse disparities in HPV vaccination: A systematic review and meta-analysis

Studies disagree about whether racial and ethnic groups have lower or higher human papillomavirus (HPV) vaccination uptake, an important issue given large disparities in some HPV cancers. We sought to characterize and explain racial and ethnic differences in HPV vaccination. We systematically searched PubMed, CINAHL, Embase, and Web of Science to identify US studies through mid-2017 reporting associations of race and ethnicity with HPV vaccination. We identified 118 studies (n = 3,095,486) published in English that reported HPV vaccine initiation or follow-through in the US from which we could calculate effect sizes. We used random effects meta-analysis to synthesize effect sizes for comparisons of Whites or non-Hispanics to Blacks, Hispanics, Asians, or all minority groups combined. Studies showed no racial or ethnic differences in HPV vaccine initiation overall. However, when restricting to studies using provider-verified vaccination data, minorities were 6.1% [3.3%-8.8%] more likely than Whites to initiate HPV vaccination. Advantages were larger for Hispanics, males, and younger samples (age < 18). In contrast, minorities were 8.6% [5.6%, 11.7%], less likely than Whites to follow-through with the full HPV vaccine series, a disparity present across all participant and study characteristics. More recent studies found larger advantages for racial and ethnic minorities in HPV vaccine initiation and smaller disparities in follow-through. In summary, high-quality studies found racial and ethnic minorities are more likely to initiate but less likely to follow-through with HPV vaccination, a clear finding that self-report studies obscure. Higher HPV vaccine initiation among minorities suggests potential reductions in HPV cancer disparities.