Papanicolaou screening behavior in mothers and human papillomavirus vaccine uptake in adolescent girls

Quadrivalent human papillomavirus vaccine uptake in adolescent boys and maternal utilization of preventive care and history of sexually transmitted infections

OBJECTIVES

We examined whether maternal utilization of preventive care and history of sexually transmitted infections (STIs) predicted quadrivalent human papillomavirus vaccine (HPV4) uptake among adolescent boys 1 year following the recommendation for permissive use of HPV4 for males.

METHODS

We linked maternal information with electronic health records of 254 489 boys aged 9 to 17 years who enrolled in Kaiser Permanente Southern California health plan from October 21, 2009, through December 21, 2010. We used multivariable Poisson regression with robust error variance to examine whether HPV4 initiation was associated with maternal uptake of influenza vaccine, Papanicolaou (Pap) screening, and history of STIs.

RESULTS

We identified a modest but statistically significant association between initiation of HPV4 series and maternal receipt of influenza vaccine (rate ratio [RR] = 1.16; 95% confidence interval [CI] = 1.07, 1.26) and Pap screening (RR = 1.13; 95% CI = 1.01, 1.26). Boys whose mothers had a history of genital warts were more likely to initiate HPV4 (RR = 1.47; 95% CI = 0.93, 2.34), although the association did not reach statistical significance (P = .1).

CONCLUSIONS

Maternal utilization of preventive care and history of genital warts may influence HPV4 uptake among adolescent boys. The important role of maternal health characteristics and health behaviors needs be considered in intervention efforts to increase vaccine uptake among boys.

Is there an association between maternal pap test use and adolescent human papillomavirus vaccination?

PURPOSE

To identify the association between mother's recent receipt of a Pap test and daughter's uptake and completion of the three-shot human papillomavirus (HPV) vaccination series.

METHODS

We used cross-sectional data from the 2008 to 2010 Behavioral Risk Factor Surveillance System from 9 U.S. states and Puerto Rico and logistic regression models to examine the association between mother's receipt of a Pap test in the past 3 years and daughter's uptake and completion of the three-shot HPV vaccination series among adolescent girls aged 9-17 years (N = 4,776).

RESULTS

Approximately one-quarter of adolescent girls began the HPV vaccination series, and 13.6% completed the three-shot series. Uptake and completion were more likely among girls whose mothers had obtained a Pap test within the past 3 years-for HPV uptake, odds ratio: 1.342, 95% confidence interval: 1.073-1.692; for HPV completion, odds ratio: 1.904; 95% confidence interval: 1.372-2.721-but the relationship between mother's recent Pap test and vaccine uptake was explained by the mother's use of a personal doctor and obtaining a routine physical examination in the past year.

CONCLUSIONS

HPV vaccination uptake and completion were more likely among adolescent girls whose mothers obtained a recent Pap test. Interventions designed to educate mothers on the importance of HPV vaccination and to facilitate relationships between physicians and mothers may prove successful at increasing HPV vaccination among adolescent girls.

"1-2-3 Pap" Intervention Improves HPV Vaccine Series Completion among Appalachian Women

Completion of the Human Papillomavirus (HPV) vaccine series is a national priority. This study not only identified correlates of intent to complete the vaccine series and actual series completion, but also tested the efficacy of a DVD intervention to promote series completion. Women's beliefs that all three doses reduced cancer risk predicted intent and completion. Intention predicted completion, as did the belief that having a friend accompany the woman would promote completion. Beyond these effects, women assigned to the intervention were 2.44 times more likely than women in the control group to complete the series. Thus, in controlled analyses, a theory-grounded DVD intervention successfully promoted HPV series completion in a community setting. This method of intervention has high translational potential.

Patient adherence to three dose completion of the quadrivalent human papillomavirus (HPV) vaccine in a private practice

The human papillomavirus quadrivalent (types 6, 11, 16, and 18) recombinant vaccine is effective in preventing cervical, vulvar, vaginal and anal cancer. Maximal protection is achieved with completion of all three recommended doses. A retrospective chart review was performed to (1) assess the current vaccine series completion rates in a private practice multispecialty suburban setting and (2) identify factors associated with failure to complete the vaccine series. Chi-square and independent samples t test were used for data analysis. A total of 4,117 patients out of 10,821 eligible patients received at least one dose of the HPV vaccine between October 1, 2006 and April 30, 2010. Overall, 69.5 % (n = 2,863) of patients who received one dose of the HPV vaccine completed all three doses in a valid time frame, representing 26.5 % of all eligible patients. Patients who completed the series were younger (16.8 vs. 18.2, p < 0.05), less likely to have a sexually transmitted disease diagnosis prior to initiation of the series (57.7 vs. 69.8 %, p < 0.05), and more likely to have visited the pediatrics department compared to family medicine, internal medicine, and OB/GYN departments (75.9, 65.7, 57.0, 60.9 %, respectively, p < 0.05). Deaths, pregnancies, and adverse drug reactions were not identified as independent factors impacting completion rates. The results indicate that adolescents, patients visiting the pediatrics department and those without a prior STD diagnosis completed the vaccination series more frequently than adults managed in family medicine, internal medicine, and OB/GYN departments.

Mothers' screening histories influence daughters' vaccination uptake: an analysis of linked cervical screening and human papillomavirus vaccination records in the North West of England

AIM

Achieving high human papillomavirus (HPV) vaccine coverage is important because cervical screening coverage is declining. As key decision makers, mothers' experiences of, and participation in, the cervical screening programme could affect vaccination consent. We investigate whether mother's screening history influences daughter's participation in the HPV vaccination programme.

METHODS

Mothers' cervical screening records from the National Health Authority Information System were linked to the daughters' HPV vaccination records from the Child Health System in North West England by address. Odds ratios for daughter's vaccination were computed using Logistic Regression, adjusting for age, Primary Care Trust and vaccine cohort (AOR).

RESULTS

Daughters in both the routine and catch up programmes were more likely to have initiated vaccination and completed the course if their mothers had attended screening. The association was strongest when mothers had attended within the last 5 years (AOR in routine group: 3.5 (95% confidence interval (CI) 3.1-4.0) for initiation and 2.2 (1.6-2.9) for retention). Mothers who had personally decided to cease screening were less likely to have vaccinated daughters than those who had ceased for medical indications. Daughters were more likely to have been vaccinated if their mothers had received an abnormal smear result.

CONCLUSIONS

Daughter's HPV vaccination uptake was associated with mother's cervical screening attendance. Daughters of mothers who are not engaged with preventive services are less likely to be vaccinated and may be less likely to engage with screening. This makes mothers central to health interventions to promote both cervical screening and HPV vaccination.

French women's knowledge of and attitudes towards cervical cancer prevention and the acceptability of HPV vaccination among those with 14 - 18 year old daughters: a quantitative-qualitative study

Background

In France, it is recommended that girls and women aged 14–23 are vaccinated against the human papillomavirus (HPV). However, French women’s knowledge of and attitude towards the vaccine has been little studied.

Methods

Thirty-nine general practitioners, representative of those working in the large Rhône-Alpes region, offered a self-administered questionnaire on cervical cancer (CC) prevention to all 18–65 year-old women who came for consultation during June and July 2008. In addition, semi-structured interviews were undertaken with a sample of those who had daughters aged 14–18.

Results

Of the 1,478 women who completed the questionnaire, only 16.9% mentioned HPV as the cause of CC, even though 76.2% knew of the vaccine. 210 women had daughters aged 14–18, and 32 were interviewed. Compared with the wider group, more of these women were aware of the HPV vaccine (91.4%). 44.8% knew the target population and 17.1% the recommended ages for vaccination. 54.3% favoured HPV vaccination; 37.2% were undecided and only 0.9% were opposed. The main barrier to acceptance was the recency of the vaccine’s introduction and concern about possible side effects (54.9%); 14.1% preferred to rely on their GP’s decision. Factors associated with acceptance of the HPV vaccine were having previously vaccinated a child against pneumococcus (OR=3.28 [1.32-8.11]) and knowing the target population for HPV vaccination (OR=2.12 [1.15-3.90]). Knowing the recommended frequency of Papanicolaou smear testing (Pap test) screening was associated with lower acceptance (OR=0.32 [0.13-0.82]).

Conclusions

Few mothers are opposed to HPV vaccination. Factors associated with acceptability were knowledge about the vaccine, acceptance of other vaccines and, unexpectedly, lack of knowledge about the recommended frequency of Pap testing. On multivariate analysis, compliance with recommendations for Pap test screening and socioeconomic factors had no effect on views about HPV vaccination. Given that concern about possible side effects is the major barrier to wider acceptance of the HPV vaccine in France, GPs have a key role in providing information.

Association between human papillomavirus vaccine uptake and cervical cancer screening in the Netherlands: implications for future impact on prevention

Several countries recently added human papillomavirus (HPV) vaccination to cervical cancer screening in the effort to prevent cervical cancer. They include the Netherlands, where both programs are free. To estimate their combined future impact on cancer prevention, information is needed on the association between participation in vaccination now and in screening in the future and on what groups are at risk for nonparticipation. We studied the association between participation in screening by mothers and in vaccination by their daughters. Girls' vaccination status was matched by house-address with their mothers' screening participation. We estimated the effect on cancer incidence by means of computer simulation. We investigated risk groups for nonparticipation using multivariable multilevel logistic regression and calculated population-attributable fractions. Our results, based on 89% of girls invited for vaccination in 2009 (n = 337,368), show that vaccination status was significantly associated with mothers' screening participation (odds ratio: 1.54 [95% confidence interval: 1.51-1.57]). If a mother's screening is taken as proxy of a girl's future screening, only 13% of the girls will not participate in either program compared to 23% if screening alone is available. The positive association between vaccination and screening resulted in slightly lower model estimates of the impact of vaccination on cancer incidence, compared to estimates assuming no association. Girls with nonwestern ethnicities, with young mothers, who live in urban areas with low socioeconomic status, are at risk for nonparticipation. A significant part of potential nonscreeners may be reached through HPV vaccination. Estimates made before vaccination was introduced only slightly overestimated its impact on cervical cancer incidence.

Human papillomavirus vaccine knowledge and hypothetical acceptance among women in Appalachia Ohio

OBJECTIVE

To assess hypothetical acceptance of the human papillomavirus (HPV) vaccine for themselves and a daughter age 9-12 years among Appalachia Ohio women.

METHODS

Women with an abnormal Pap smear and randomly selected women with a normal Pap smear from 17 clinics completed an interview in 2006-2008.

RESULTS

From 1131 original study participants, 807 (71%) completed a survey about the HPV vaccine for their daughters and themselves. Nearly half, 380 (47%), of the participants had heard of a vaccine to prevent cancer, and 362 (95%) of respondents had heard of HPV. The participants were then told that the FDA had approved a vaccine to prevent HPV. Only 379 (38%) participants identified girls ages 9-12 years as a group who should get the vaccine. After being given the official HPV vaccine recommendation statement, 252 (31%) wanted the vaccine; 198 (25%) were "not sure"; and 353 (44%) did not want the vaccine for themselves. With respect to giving the HPV vaccine to a daughter ages 9-12 years, participants responded "yes" 445 (55%); "not sure" 163 (20%); or "no" 185 (23%). Numerous reasons were provided supporting and opposing vaccine acceptance for themselves and for a daughter. Their physician's recommendation for the HPV vaccine increased vaccine acceptance to 86% for themselves and 90% for a daughter.

CONCLUSION

Knowledge, acceptance, and barriers about the HPV vaccine vary among women living in Appalachia Ohio. Physician recommendation is a key facilitator for vaccine diffusion in this region.

The study of human papillomavirus (HPV) vaccine uptake from a parental perspective: a systematic review of observational studies in the United States

Despite widespread information about the human papillomavirus (HPV) vaccine, uptake continues to be low (CDC, 2010). HPV vaccine uptake may be maximized by better understanding factors likely to influence parents' decisions to vaccinate their age-recommended children. Previous reviews have summarized barriers and facilitators likely to influence parents' decision to vaccinate their adolescents (mostly daughters) against HPV; however, less attention has been given to summarize and evaluate the methodology. The aim of this study is to systematically review the methodology used in observational studies of HPV vaccine uptake from a parental perspective. A systematic search of Academic Search Premier, CINAHL, ERIC, Medline and PsycInfo to obtain relevant articles after FDA vaccine approval (2006 to present) yielded 446 studies, of which 17 studies were eligible. Results showed the majority of studies were cross-sectional, with random sampling from list-assisted sources being the most common method for data collection. Most studies used convenience samples and relied on parental self-report. Also, the majority of studies explored vaccine initiation, but only a few explored regimen completion and timely completion of vaccine regimen. Given that the effectiveness of the HPV vaccine is based on established recommendations for a three dose regimen within a timely interval, studies on factors likely to influence regimen completion and timely completion of regimen are essential to maximize the effectiveness and public health benefits of the vaccine. Research with more diverse samples, better and increased use of random sampling techniques, and the use of precise and objective measures of vaccine uptake to supplement parental self-report, is necessary to reduce selection and information biases in future studies. Studies to inform on factors likely to influence parents' decisions to vaccinate their sons against HPV are also needed.

Inuit women's attitudes and experiences towards cervical cancer and prevention strategies in Nunavik, Quebec

OBJECTIVES

To describe the attitudes about and experiences with cervical cancer, Pap smear screenings and the HPV vaccine among a sample of Inuit women from Nunavik, Quebec, Canada. We also evaluated demographic and social predictors of maternal interest in HPV vaccination.

STUDY DESIGN

A mixed method design was used with a cross-sectional survey and focus group interviews.

METHODS

Women were recruited through convenience sampling at 2 recruitment sites in Nunavik from March 2008 to June 2009. Differences in women's responses by age, education, and marital status were assessed. Unconditional logistic regression was used to determine predictors of women's interest in HPV vaccination for their children.

RESULTS

Questionnaires were completed by 175 women aged 18-63, and of these women a total of 6 women aged 31-55 participated in 2 focus groups. Almost half the survey participants had heard of cervical cancer. Women often reported feelings of embarrassment and pain during the Pap smear and older women were more likely to feel embarrassed than younger women. Only 27% of women had heard of the HPV vaccine, and 72% of these women were interested in vaccinating their child for HPV. No statistically significant predictors of maternal interest in HPV vaccination were found.

CONCLUSIONS

Our findings indicate that health service planners and providers in Nunavik should be aware of potential barriers to Pap smear attendance, especially in the older age groups. Given the low awareness of cervical cancer, the Pap smear and the HPV vaccine, education on cervical cancer and prevention strategies may be beneficial.

Human papillomavirus vaccine use among adolescent girls and young adult women: an analysis of the 2007 California Health Interview Survey

BACKGROUND

Administration of the human papillomavirus (HPV) vaccine is recommended for adolescent girls and young adult women. Little is known about the factors associated with vaccination. This study examined prevalence and correlates of HPV vaccine initiation (≥1 dose) among a statewide representative sample of adolescent and young adult females living in California.

METHODS

HPV vaccination data on 3615 parents of adolescent girls aged 12-17 and 2068 young adult women aged 18-27 from the 2007 California Health Interview Survey (CHIS) were examined by sociodemographic, healthcare access, and health behavior factors using chi-square and multivariable logistic regression models.

RESULTS

Nineteen percent of adolescent girls and 11% of young adult women had initiated the HPV vaccine series. In both groups, lower educational attainment (parental/own) was associated with lack of vaccine initiation. For adolescents, vaccine initiation was also significantly lower among those whose parents had low incomes or no usual source of care. For young adults, initiation was lower among the older group and those who spent less time in the United States, had public insurance, had no recent provider visit, or had fewer sexual partners.

CONCLUSIONS

In a statewide representative sample, different correlates of early initiation of HPV vaccination emerged for Californian adolescent girls and young adult women. These different patterns may be due to differential access to programs that provide free or low-cost HPV vaccines. Because several of these factors are associated with disparities in use of Pap tests, disparities will persist or even worsen unless greater effort is placed on vaccinating populations at highest risk for cervical cancer.

Adolescent perceptions of risk and need for safer sexual behaviors after first human papillomavirus vaccination

OBJECTIVES

To (1) examine perceptions of risk of human papillomavirus (HPV) and other sexually transmitted infections (STIs), (2) examine perceived need for safer sexual behaviors, and (3) determine factors associated with less perceived need for safer sexual behaviors, all in the context of receiving the first HPV vaccination.

DESIGN

Cross-sectional baseline analysis from an ongoing longitudinal cohort study.

SETTING

An urban hospital-based adolescent primary care clinic.

PARTICIPANTS

Girls 13 to 21 years (for this article girls are defined as being aged 13 to 21 years) (n = 339) receiving their first HPV vaccination and their mothers (n = 235).

MAIN OUTCOME MEASURES

(1) Girls' perceived risk of HPV after HPV vaccination, (2) girls' perceived risk of other STIs after vaccination, (3) girls' perceived need for continued safer sexual behaviors after vaccination, and (4) factors associated with girls' perception of less need for safer sexual behaviors.

RESULTS

Mean age of girls was 16.8 years. Most participants (76.4%) were black, and 57.5% were sexually experienced. Girls perceived themselves to be at less risk for HPV than for other STIs after HPV vaccination (P < .001). Although most girls reported continued need for safer sexual behaviors, factors independently associated with perception of less need for safer sexual behaviors included adolescent factors (lower HPV and HPV vaccine knowledge and less concern about HPV) and maternal factors (lower HPV and HPV vaccine knowledge, physician as a source of HPV vaccine information, and lack of maternal communication about the HPV vaccine).

CONCLUSIONS

Few adolescents perceived less need for safer sexual behaviors after the first HPV vaccination. Education about HPV vaccines and encouraging communication between girls and their mothers may prevent misperceptions among these adolescents.

National patterns in human papillomavirus vaccination: an analysis of the National Survey of Family Growth

Human papillomavirus (HPV) vaccine has shown effectiveness for girls and young women. Despite this, there are population disparities in vaccine utilization rates. The purpose of this study was to evaluate maternal correlates of HPV vaccination among their adolescent daughters using a nationally-representative population-based sample, emphasizing race/ethnicity-specific disparities and barriers. Mothers of 9-18 y-old girls having heard of HPV vaccine and completing the HPV vaccine survey module from the 2006-2008 National Survey of Family Growth (NSFG) (n = 444) were analyzed for maternally-reported adolescent HPV vaccination and maternal intent to vaccinate her adolescent daughter if no dose had been received. Correlates of uptake and intent were examined using multivariate logistic regression. 27% of mothers (n = 98) reported that their daughters were vaccinated against HPV. Independent correlates of vaccination included African-American race (adjusted odds ratio (AOR),0.29; 95% confidence interval (CI),0.11-0.77), and living below the poverty level (AOR,4.43; 95%CI, 1.53-12.82). 46% (n = 152) of mothers of non-vaccinated daughters intended to vaccinate them. Correlates of maternal intention included maternal pelvic exam history (AOR,0.06; 95%CI, 0.007-0.51), multiple male lifetime sexual partners (AOR,3.22 ; 95% CI, 1.34-7.76), religiosity (AOR,0.37; 95% CI,0.16-0.87) and acceptability of premarital sex among 18 y-olds (AOR,2.45; 95% CI, 1.16-5.20). In conclusion, HPV vaccination initiation among adolescent daughters of mothers participating in the NSFG continues to lag among African-American participants. However, no racial/ethnic differences in maternal intent-to-vaccinate her daughter were detected. Future interventions need to address specific maternal barriers to vaccine uptake and how these may differ from vaccine intention.

Sexually related behaviors as predictors of HPV vaccination among young rural women

PURPOSE

To explore whether sexually related behaviors predict refusal of the human papillomavirus (HPV) vaccine among a sample of women aged 18-26 in Appalachian Kentucky.

METHODS

Using a convenience sample, young women attending health clinics and a community college in southeastern Kentucky were recruited to participate in a Women's Health Study. After completing a questionnaire, women received a free voucher for the three-dose HPV vaccine series. Completion of dose one served as the outcome variable.

RESULTS

Women with a history of an abnormal Pap test were almost two times more likely to decline the HPV vaccine (adjusted odds ratio [AOR] 1.91, 95% confidence interval [CI] 1.14-3.20, p=0.015), and women who reported they had never had a Pap test were four times more likely to decline the vaccine (AOR 4.02, 95% CI 1.13-14.32, p=0.032). Women engaging in mutual masturbation were nearly two times more likely to decline the free vaccine (AOR 1.91, 95% CI 1.17-3.10, p=0.009). Use of hormonal birth control showed a protective effect against refusal of the free HPV vaccine (AOR 0.593, 95% CI 0.44-0.80, p=0.001).

CONCLUSIONS

Among this sample of Appalachian women, those engaging in behaviors that increase their risk for HPV infection were more likely to refuse the vaccine. Conversely, those women engaging in protective health behaviors were more likely to accept the vaccine. These findings suggest that those women not being vaccinated may be the very group most likely to benefit from vaccination. Cervical cancer prevention programs need to be creative in efforts to reach young women most in need of the vaccine based on a higher profile of sexually related behaviors and the proxy measure of this risk (having an abnormal Pap test result).

Multilevel correlates for human papillomavirus vaccination of adolescent girls attending safety net clinics

BACKGROUND

Adolescent HPV vaccination in minority and low income populations with high cervical cancer incidence and mortality could reduce disparities. Safety-net primary care clinics are a key delivery site for improving vaccination rates in these populations.

PURPOSE

To examine prevalence of HPV initiation (≥ 1 dose), completion (receipt of dose 3 within 12 months of initiation), and receipt of 3 doses in four safety-net clinics as well as individual-, household-, and clinic-level correlates of initiation.

METHODS

We used multilevel modeling to investigate HPV initiation among 700 adolescent females who sought primary care in four safety-net clinics in Dallas, Texas from March 2007 to December 2009. Data were abstracted from patients' paper and electronic medical records.

RESULTS

HPV vaccine uptake varied significantly by clinic. Across clinics, initiation was 36.6% and completion was 39.7% among those who initiated. In the total study population, only 15.7% received all three doses. In multivariate, two-level logistic regression analyses, initiation was associated with receipt of other adolescent vaccines, influenza vaccination in the year prior to data abstraction, being sexually active, and having more chart documentation (presence of health maintenance questionnaire and/or immunization record). There was no association between initiation and age, race/ethnicity, or insurance status.

CONCLUSIONS

In four urban safety-net clinics, HPV initiation rates paralleled 2008 national rates. The correlation of HPV initiation with other adolescent vaccines underscores the importance of reviewing vaccination status at every health care visit. HPV vaccine uptake in safety-net clinics should continue to be monitored to understand impact on cervical cancer disparities.

Like mother, like daughter? Mother's history of cervical cancer screening and daughter's Human Papillomavirus vaccine uptake in Flanders (Belgium)

OBJECTIVE

We investigated whether and to what extent the uptake of the Human Papillomavirus (HPV) vaccine by girls aged 12-18 was related to the cervical cancer screening history of age-appropriate older female household members (assumed to be their mothers) in Flanders (Belgium).

METHODS

We studied administrative records on 127,854 female members of the National Alliance of Christian Mutualities, which is the largest health insurance fund in Flanders. Reimbursement data for HPV vaccination of girls for the period 2007-2009 were linked with reimbursement data for cervical cancer screening of their mothers in the three preceding years. A multilevel logit model was used to study associations between both preventive behaviors. In the model we controlled for both the girl's and the mother's age, the province of residence and the socio-economic background of the family.

RESULTS

A clear association between a mother's history of participation in cervical cancer screening and her daughter's HPV vaccination initiation was found. The conditional odds of HPV vaccination initiation were more than 4 times higher for girls whose mother had one Pap test than for girls whose mother had none (odds ratio [OR]=4.5; 95% confidence interval [CI]=3.5-5.9). For girls whose mother had three or more Pap tests, the conditional odds were 16 times higher than for girls whose mother did not have any pap tests ([OR]=16.0; 95% [CI]=12.1-21.2). The effect of screening (having received 1 pap smear as compared to none) was larger for girls living in neighborhoods with the lowest median income ([OR]=6.0, 95% [CI]=3.6-10.1).

CONCLUSION

In a situation where both cervical cancer screening and HPV vaccination are opportunistic, we found evidence that these preventive behaviors cluster within families.

Health promotion as a behavioural challenge: are we missing attitudes?

Despite the considerable financial and organizational resources of health promotion campaigns, their effectiveness in tackling current health problems is limited. In the following commentary, we argue that health promotion is best understood as a behavioural challenge. Behaviour can be understood in terms of three aspects: knowledge, skills and attitudes. While knowledge and skills have received adequate attention, the attitudinal approach has been significantly underutilized. To this end, we have used the examples of prevention of H1N1 transmission, hand washing in hospitals and prevention of cervical cancer to elucidate our points. We also provide recommendations of how the attitudinal approach can enhance the effectiveness of health promotion interventions.

The Uptake of Human Papillomavirus (HPV) Vaccine Among Adolescent Females in the United States

A comprehensive review of literature was conducted to identify the barriers and facilitators, from the parents'/guardians' and primary care providers' (PCPs) perspective, that are associated with the uptake of Human Papillomavirus (HPV) vaccine among adolescent females. Findings from 14 peer-reviewed articles indicate that 37% of adolescent females, 9 to 17 years of age, initiated the HPV vaccine, compared to the national average of 13- to 15-years-olds, which is 50%. The overall uptake and completion rates of the vaccine were low across all racial and ethnic groups. Barriers included parents'/guardians' knowledge, perceptions, and attitudes toward the HPV disease and the vaccine, along with the convenience in receiving the vaccine. Six studies reported that HPV vaccine initiation was highly likely if the parents/guardians had received a doctor’s recommendation. Learning what interventions school nurses currently utilize could positively affect the HPV vaccine uptake and completion rates by other nursing disciplines realizing this ongoing effort.

HPV vaccine and adolescent males

In 2009, the United States approved quadrivalent HPV vaccine for males 9-26 years old, but data on vaccine uptake are lacking. We determined HPV vaccine uptake among adolescent males, as well as stage of adoption and vaccine acceptability to parents and their sons. A national sample of parents of adolescent males ages 11-17 years (n=547) and their sons (n=421) completed online surveys during August and September 2010. Analyses used multivariate linear regression. Few sons (2%) had received any doses of HPV vaccine, and most parents and sons were unaware the vaccine can be given to males. Parents with unvaccinated sons were moderately willing to get their sons free HPV vaccine (mean=3.37, SD=1.21, possible range 1-5). Parents were more willing to get their sons vaccinated if they perceived higher levels of HPV vaccine effectiveness (β=0.20) or if they anticipated higher regret about their sons not getting vaccinated and later developing an HPV infection (β=0.32). Vaccine acceptability was also modest among unvaccinated sons (mean=2.98, SD=1.13, possible range 1-5). Sons were more willing to get vaccinated if they perceived higher peer acceptance of HPV vaccine (β=0.39) or anticipated higher regret about not getting vaccinated and later developing an HPV infection (β=0.22). HPV vaccine uptake was nearly nonexistent a year after permissive national recommendations were first issued for males. Vaccine acceptability was moderate among both parents and sons. Efforts to increase vaccine uptake among adolescent males should consider the important role of peer acceptance and anticipated regret.

The cross-cultural variation of predictors of human papillomavirus vaccination intentions

BACKGROUND

The influence of health beliefs on human papillomavirus (HPV) vaccine acceptability have been extensively documented in past research. However, studies documenting the generalizability of prior findings to culturally diverse participants are lacking. The importance of generalizability studies is underscored by the immense disparities in cervical cancer rates across ethnicities. Moreover, theory in cultural psychology suggests that beliefs derived from personal expectations may not be the strongest predictors of intentions in individuals socialized in collectivist cultures. The purpose of this research was to investigate the strongest predictors of mothers' intentions to vaccinate their daughters across three cultural groups: Hispanic, non-Hispanic white, and African American.

METHODS

One hundred fifty mothers were recruited from Public Health Department clinics in Milwaukee, Wisconsin. Mothers were asked to answer measures that assessed personal and normative predictors of intentions.

RESULTS

Results indicated that predictors of vaccination intentions varied cross-culturally. Specifically, culture moderated the influence of norms on intentions.

CONCLUSIONS

Interventions designed for Hispanics may be more effective if norms, rather than attitudes, are targeted.

Knowledge and intention to participate in cervical cancer screening after the human papillomavirus vaccine

BACKGROUND

If women who receive the human papillomavirus (HPV) vaccine are unduly reassured about the cancer prevention benefits of vaccination, they may choose not to participate in screening, thereby increasing their risk for cervical cancer. This study assesses adult women's knowledge of the need to continue cervical cancer screening after HPV vaccination, describes Pap test intentions of vaccinated young adult women, and evaluates whether knowledge and intentions differ across groups at greatest risk for cervical cancer.

METHODS

Data were from the 2008 Health Information National Trends Survey (HINTS) and the 2008 National Health Interview Survey (NHIS), which initiated data collection approximately 18 months after the first FDA approval of an HPV vaccine. We calculated associations between independent variables and the outcomes using chi-square tests.

RESULTS

Of 1586 female HINTS respondents ages 18 through 74, 95.6% knew that HPV-vaccinated women should continue to receive Pap tests. This knowledge did not vary significantly by race/ethnicity, education, income, or healthcare access. Among 1101 female NHIS respondents ages 18-26 who had ever received a Pap test, the proportion (12.7%; n=139) who reported receipt of the HPV vaccine were more likely than those not vaccinated to plan to receive a Pap test within three years (98.1% vs. 92.5%, p<0.001).

CONCLUSIONS

US adult women possess high knowledge and intention to participate in Pap testing after HPV vaccination. The vast majority of young adult women who received the HPV vaccine within its first two years on the market intend to participate in cervical cancer screening in the near future. Future studies are needed to examine whether those vaccinated in adolescence will become aware of, and adhere to, screening guidelines as they become eligible.

The acceptability of human papillomavirus vaccine among parents and guardians of newborn to 10-year-old children

STUDY OBJECTIVE

The purpose of our study was to evaluate HPV vaccine acceptance among parents and guardians of children aged 0-10 years.

DESIGN

Prospective questionnaire study.

SETTING

Cleveland Clinic Children's Hospital.

PARTICIPANTS

Parents and guardians of children aged 0-10 years.

INTERVENTIONS

Brief HPV vaccine educational intervention.

OUTCOME MEASURE

Desire for child to get HPV vaccine.

RESULTS

We enrolled 81 participants in the study; 70 (86%) were female, and 39 (49%) were Caucasian. Prior to receiving an educational fact sheet about HPV and the HPV vaccine, only 49% of participants reported that they wanted their young child to receive the HPV vaccine when it becomes available. After receiving the fact sheet, this number increased to 70%, suggesting that a simple educational intervention could significantly affect vaccine acceptance in this population (P = .001). Other significant results of this study included that HPV vaccination would receive greater acceptance if the participants believed that it can prevent HPV infection in their child (P = .0024), it was perceived to be safe (P = .0005), and if the vaccine were recommended by a physician (P < .0001). Participants' attitudes about HPV vaccination were not affected by concerns over whether receiving the vaccine might mean the child is more likely to have sex or to have multiple sexual partners.

CONCLUSIONS

Our results suggest that if it were approved for children aged 0-10 years, the HPV vaccine would be accepted by the parents and guardians provided they received adequate educational information about it.

Explaining variation in the uptake of HPV vaccination in England

BACKGROUND

In England, two national programmes of HPV vaccination for girls have been instituted, a routine programme for 12- and 13-year-olds and a catch-up programme for 17- and 18-year-olds. Uptake rates across the country have been far from uniform, and this research sought to identify factors explaining the variation in uptake by locality.

METHODS

An association between uptake, deprivation and ethnic background had been established in pilot research. The present analysis was conducted at an aggregate, Primary Care Trust (PCT), level for the first year of the programmes. Published measures of HPV vaccination uptake, material deprivation, ethnic composition of PCT populations, primary care quality, and uptake of cervical screening and of other childhood immunisations were collated. Strong evidence of collinearity amongst the explanatory variables required a factor analysis to be undertaken. This provided four independent factors, used thereafter in regression models to explain uptake by PCT.

RESULTS

The factor analysis revealed that ethnic composition was associated with attitudes towards cervical screening and other childhood vaccinations, whilst material deprivation and quality of primary care were orthogonal. Ethnic composition, early childhood vaccination, cervical screening and primary care quality were found to be influential in predicting uptake in both the routine and the catch-up cohorts, although with a lower degree of confidence in the case of the last two independent variables. Lower primary care quality was significant in explaining a greater fall in vaccination uptake between the first two doses in the catch-up cohort. Greater deprivation was a significant explanatory factor for both uptake and the fall in uptake between doses for the catch-up cohort but not for uptake in the routine cohort.

CONCLUSION

These results for uptake of the first year of the national programme using aggregate data corroborate findings from intentions surveys and pilot studies. Deprivation, the ethnic composition of the population, the effectiveness of primary care and the acceptability of childhood vaccinations are salient factors in explaining local HPV vaccine uptake in England.

Statewide HPV vaccine initiation among adolescent females in North Carolina

BACKGROUND

Cervical cancer incidence in the United States may be greatly reduced through widespread human papillomavirus (HPV) vaccination. We estimated the statewide level of HPV vaccine initiation among adolescent girls in North Carolina and identified correlates of vaccine initiation.

METHODS

We used data from 617 parents of adolescent females from North Carolina who completed the population-based 2008 Child Health Assessment and Monitoring Program survey. Analyses used weighted multivariate logistic regression.

RESULTS

Overall, 31.3% of parents reported their daughters had received at least 1 dose of HPV vaccine. Vaccine initiation was higher among daughters aged 13 to 15 years (odds ratio [OR] = 2.03, 95% CI, 1.12-3.67) or 16 to 17 years (OR = 3.21, 95% CI, 1.76-5.86) compared with those 10 to 12 years old. Additional correlates of HPV vaccine initiation included the daughter having a preventive check-up in the last 12 months (OR = 5.09, 95% CI, 2.43-10.67), having received meningococcal vaccine (OR = 2.50, 95% CI, 1.55-4.01), or being from an urban area (OR = 1.81, 95% CI, 1.02-3.21). Among parents of unvaccinated daughters, intent to vaccinate in the next year was higher among those with daughters aged 13 to 17 years. Parents of unvaccinated non-Hispanic white daughters reported lower levels of intent to vaccinate within the next year compared with parents of unvaccinated daughters of other races.

CONCLUSIONS

HPV vaccine initiation in North Carolina is comparable with other US areas. Potential strategies for increasing HPV vaccination levels include reducing missed opportunities for HPV vaccination at preventive check-ups and increasing concomitant administration of HPV vaccine with other adolescent vaccines.

Correlates of receiving recommended adolescent vaccines among adolescent females in North Carolina

BACKGROUND

Immunization is a successful and cost-effective method for preventing disease, yet many adolescents do not receive recommended vaccines. We assessed correlates of uptake of three vaccines (tetanus booster, meningococcal, and human papillomavirus [HPV] vaccines) recommended for adolescent females. Methods. We examined cross-sectional data from 647 parents of 11-20 year-old females from North Carolina who completed the Carolina HPV Immunization Measurement and Evaluation (CHIME) Project follow-up survey in late 2008. Analyses used ordinal and binary logistic regression.

RESULTS

Only 17% of parents indicated their daughters had received all three vaccines. Eighty-seven percent of parents indicated their daughters had received tetanus booster vaccine, 36% reported vaccination against meningococcal disease, and 36% reported HPV vaccine initiation. Daughters aged 13-15 years (OR = 1.70, 95% CI: 1.09-2.64) or 16-20 years (OR = 2.28, 95% CI: 1.51-3.44) had received a greater number of these vaccines compared to daughters aged 11-12 years. Daughters who had preventive care visits in the last year (OR = 4.81, 95% CI: 3.14-7.34) or whose parents had at least some college education (OR = 1.90, 95% CI: 1.29-2.80) had also received a greater number of these vaccines.

CONCLUSIONS

Few daughters, particularly 11-12 years olds, had received all three vaccines recommended for adolescent females. Ensuring annual preventive care visits and increasing concomitant administration of adolescent vaccines may help increase vaccine coverage.

Scaling up human papillomavirus vaccination: a conceptual framework of vaccine adherence

This review article provides a conceptual framework for human papillomavirus (HPV) vaccine acceptance and adherence, with a focus on improving understanding of the sociocultural factors impacting vaccine adherence behaviour. We include a systematic review of the slowly expanding literature on HPV vaccine acceptability and uptake in developed nations, as well as the relatively few publications from poorer nations, where more than 80% of global cervical cancer related deaths occur and where the vaccine will probably have the largest impact. We suggest that this conceptual framework will not only improve our understanding of HPV vaccine uptake and adherence, but it may also guide future sociobehavioural research geared towards improving adherence to the HPV vaccine and other multi-step vaccines in a young population at risk for sexually transmissible infections.

Standard definitions of adherence for infrequent yet repeated health behaviors

OBJECTIVE

To present common language for defining adherence of infrequent yet repeated health behaviors.

METHODS

We illustrate methodological and conceptual issues using human papillomavirus (HPV) vaccination and screening mammography study data as examples.

RESULTS

Adherence rates of infrequent, repeated behaviors varied widely depending on how adherence was defined and measured. We advocate use of 3 standard definitions of adherence: initiation of behavior (initiation), adherence to most recent opportunity (on-schedule), and timely adherence across multiple opportunities (maintenance or completion).

CONCLUSIONS

The proposed framework has cross-cutting implications for research and practice. Standardizing adherence metrics may facilitate comparisons across studies of health behaviors practiced at infrequent yet repeated intervals.

Behavioral correlates of HPV vaccine acceptability in the 2007 Health Information National Trends Survey (HINTS)

The development of a prophylactic vaccine to prevent infection with oncogenic subtypes of human papillomavirus (HPV) is an important step in reducing cervical cancer incidence and mortality. However, national data indicate that only 37% of 13- to 17-year-old females have initiated the vaccine series. Prior studies have examined demographic, medical history, and psychosocial variables associated with parental HPV vaccine acceptability, although few have investigated the behavioral correlates of vaccine acceptability. The primary purpose of the current study is to report on national acceptability of the HPV vaccine among U.S. adults with female children in the household and to investigate the health behavior correlates of vaccine acceptability. Data were drawn from the 2007 Health Information National Trends Survey (HINTS). The study sample comprised 1,383 adults who reported having a female child under the age of 18 in their household (52% female, 59% white; mean age = 40 years). More than half (58%) reported they would have a daughter get the HPV vaccine, 25% were not sure, and 18% would not have a daughter vaccinated. Behavioral factors significantly associated with lower acceptance of the HPV vaccine included lack of physical activity in the past month (P = 0.002), past year use of complementary or alternative therapies (P = 0.021), and no history of smoking (P = 0.005). These results suggest that behavioral health factors may be associated with vaccine acceptability and further our understanding of how behavioral patterns may contribute to the uptake of new cancer prevention strategies.

Geographic disparity, area poverty, and human papillomavirus vaccination

BACKGROUND

A human papillomavirus (HPV) vaccine was approved by the Food and Drug Administration for use among women/girls in 2006. Since that time, limited research has examined HPV vaccine uptake among adolescent girls and no studies have examined the role of geographic disparities in HPV vaccination.

PURPOSE

The purpose of this study is to examine geographic disparity in the prevalence of human papillomavirus (HPV) vaccination and to examine individual-, county-, and state-level correlates of vaccination.

METHODS

Three-level random intercept multilevel logistic regression models were fitted to data from girls aged 13-17 years living in six U.S. states using data from the 2008 Behavioral Risk Factor Surveillance System (BRFSS) and the 2000 U.S. census.

RESULTS

Data from 1709 girls nested within 274 counties and six states were included. Girls were predominantly white (70.6%) and insured (74.5%). Overall, 34.4% of girls were vaccinated. Significant geographic disparity across states (variance=0.134, SE=0.065) and counties (variance=0.146, SE=0.063) was present, which was partially explained by state and county poverty levels. Independent of individual-level factors, poverty had differing effects at the state and county level: girls in states with higher levels of poverty were less likely whereas girls in counties with higher poverty levels were more likely to be vaccinated. Household income demonstrated a similar pattern to that of county-level poverty: Compared to girls in the highest-income families, girls in the lowest-income families were more likely to be vaccinated.

CONCLUSIONS

The results of this study suggest geographic disparity in HPV vaccination. Although higher state-level poverty is associated with a lower likelihood of vaccination, higher county-level poverty and lower income at the family level is associated with a higher likelihood of vaccination. Research is needed to better understand these disparities and to inform interventions to increase vaccination among all eligible girls.

Correlates for human papillomavirus vaccination of adolescent girls and young women in a managed care organization

The authors studied the characteristics of those who initiated the human papillomavirus (HPV) vaccine versus those who did not. Female members of Kaiser Permanente Southern California aged 9-26 years were identified and assessed for HPV vaccination between October 2006 and March 2008. Multivariable log-binomial regression was used to examine the association of the following factors with vaccine initiation: 1) demographics, 2) provider characteristics, 3) health care utilization, 4) women's health-related conditions, and 5) selected immune-related conditions. The study included 285,265 females. All analyses were stratified by 2 age groups: 9-17 years and 18-26 years. Black race (relative risk (RR)(9-17 years) = 0.93, RR(18-26 years) = 0.82), having a male primary care provider (RR(9-17 years) = 0.93, RR(18-26 years) = 0.84), and history of hospitalizations were associated with a lower likelihood of vaccine initiation. Higher neighborhood income level, physician office visits, and history of influenza vaccination (RR(9-17 years) = 1.20, RR(18-26 years) = 1.34) were associated with higher HPV vaccine uptake. Those with a history of sexually transmitted diseases were more likely and those with immune-related conditions were not less likely to initiate the HPV vaccine. These findings are helpful for interpreting the results of observational safety studies and providing insights for developing targeted HPV vaccination programs.

Predictors of HPV vaccine uptake among women aged 19-26: importance of a physician's recommendation

Among insured women, aged 19-26 years, those who discussed the HPV vaccine with their physician and received a recommendation were overwhelmingly more likely to be vaccinated. Student status and perception of the personal importance of vaccination were also predictive of vaccination. The strength of the physician's recommendation played a significant role in the decision to be vaccinated, resulting in a 4-fold greater likelihood of vaccination when women received a strong recommendation versus one that was not strong. Health care providers should be well-informed about HPV vaccination and recognize that the strength of their recommendation to patients will foster appropriate uptake.

Factors influencing familial decision-making regarding human papillomavirus vaccination

OBJECTIVE

The purpose of this review is to summarize the research regarding Human Papillomavirus (HPV) vaccination uptake among families with adolescent/preadolescent daughters.

METHODS

Literature searches (utilizing PubMed and PsychInfo databases) were conducted and research examining psychological and environmental factors which relate to HPV vaccine uptake and intentions was reviewed.

RESULTS

Factors such as physician recommendations, perceptions of the beliefs of peers and significant others, history of childhood immunizations, and communication with adolescents regarding sexual topics appear to influence HPV vaccination outcomes.

CONCLUSIONS

Although primary prevention of cervical and other cancers is available for preadolescent and adolescent girls, rates of HPV vaccine uptake are low. Future interventions should target vaccine intent and physician/family communication as a means to increasing HPV vaccination.

Patient and clinic factors associated with adolescent human papillomavirus vaccine utilization within a university-based health system

We reviewed clinical and billing data from a university-based health system to assess HPV vaccine utilization among 9-18-year-old girls by individual, visit and medical specialty characteristics. Our sample included 10,082 adolescent patients with 27,928 visits to outpatient family medicine (FM), pediatric and gynecology clinics between January 2007 and March 2008. Vaccine series completion was low among eligible adolescents (15%), with important disparities in vaccine utilization by medical specialty, age, race and insurance status. Missed opportunities for vaccination were common. Our findings may help to target future interventions aimed at increasing adolescent HPV vaccine utilization.

Exposure to high-risk genital human papillomavirus and its association with risky sexual practices and laboratory-confirmed chlamydia among African-American women

BACKGROUND

Genital human papillomavirus (HPV) is the most common sexually transmitted infection (STI) in the United States and African-American women have the highest prevalence of high-risk HPV. This study examined exposure to high-risk HPV in African-American women and its relation to risky sexual practices and laboratory-confirmed chlamydia.

METHODS

A sample of 665 African-American women between 18 and 29 years old, recruited from October 2002 to March 2006 in Atlanta, Georgia, completed an Audio Computer-Assisted Survey Interview assessing sociodemographics, health practices, and risky sexual practices. Participants also provided vaginal swab specimens assayed for STIs and high-risk HPV.

RESULTS

The overall prevalence of high-risk HPV was 38.9%. Among women 18 to 24 years old, it was 42.4%; it was 31% among women 25 to 29 years old. Age-stratified logistic regression analyses indicated that women between the ages of 18 and 29 and 18 and 24 who had multiple male sexual partners did not use a condom during their last casual sexual encounter and tested positive for chlamydia were significantly more likely to test positive for high-risk HPV. Women 18 to 24 years old who reported having a casual or risky sexual partner were significantly more likely to test positive for high-risk HPV. No significant correlates were identified among women 25 to 29 years old.

CONCLUSIONS

Programs should aim to educate, decrease risky sexual practices, and increase screening and treatment for STIs among women with high-risk HPV infections. HPV vaccination recommendations for young adult African-American women warrant special consideration.