Taking stock and looking ahead: Behavioural science lessons for implementing the nonavalent human papillomavirus vaccine

Web and theory-based motivational interviews in encouraging mothers for HPV vaccination of their daughters: A randomized controlled study

BACKGROUND

Mothers' intentions regarding the Human Papillomavirus (HPV) vaccination of their daughters are crucial, especially in societies that prioritize cultural and religious values.

OBJECTIVES

This study aimed to encourage mothers to vaccinate their daughters against HPV by enhancing their perceptions of the vaccine's benefits, susceptibility, severity, and knowledge levels, while reducing their barriers through web-based interventions and Health Belief Model-based motivational interviews.

METHODS

The study was designed as a pre-mid-post test randomized controlled experimental study. The sample included 63 mothers of female high school students (31 in the experimental group, 32 in the control group). Data were collected using a "Demographical and Descriptive Characteristics Information Form", "Health Belief Model Scale for Human Papillomavirus and Its Vaccination" and "Human Papillomavirus Knowledge Scale". Mothers in the experimental group received three HBM-based motivational interviews, web support, and follow-up.

CLINICALTRIALS

gov code is NCT04992741.

RESULTS

Following the interventions, the experimental group exhibited higher levels of knowledge, benefit, susceptibility, and severity perception of HPV vaccination, and lower perceptions of barriers compared to the control group. At the end of the study, 24 mothers from the experimental group and 5 mothers from the control group decided to vaccinate their daughters against HPV.

CONCLUSIONS

Motivational interviews, along with web support and monitoring, significantly enhanced mothers' knowledge and beliefs.

IMPLICATIONS FOR PRACTICES

This study provides evidence for the applicability of theory-based motivational interviewing in the acceptance of HPV vaccine by mothers. It enables the dissemination of HPV vaccination and encourages community health nurses to use theory-based motivational interviewing to recommend HPV vaccination.

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.

Factors associated with the human papillomavirus (HPV) vaccination across three countries following vaccination introduction

Direct international comparisons which aim to understand how factors associated with human papillomavirus (HPV) vaccine initiation and attitudes towards the HPV vaccination in parents differ are scarce. Parents (n = 179) of daughters aged 9-17 years in the US, UK and Australia completed an online survey in 2011 with questions measuring daughters' HPV vaccination status, HPV knowledge, HPV vaccination knowledge, and statements assessing attitude towards the HPV vaccine. The strongest factor associated with vaccination status across all countries was parental HPV knowledge (p < 0.001). Parents with both very low and very high knowledge scores were less likely to have vaccinated their daughters. Parents with higher HPV vaccination knowledge scores intended to vaccinate their daughters (if not already vaccinated) for protective reasons (p < 0.001), while those whose daughters were already vaccinated understood that vaccination protection was not 100% and that their daughters may still be at risk of getting HPV (p < 0.05). Compared to the UK and Australia, a higher proportion of parents with unvaccinated daughters from the US were worried about the side-effects of the HPV vaccination (US: 60.5%, UK: 36.4%, AUS: 15.4%; p < 0.05), believed that getting the vaccination might be a hassle (US: 21.1%, UK: 0%, AUS: 7.7%; p < 0.05), and that the vaccine was too new (US: 44.7%, UK: 22.7%, AUS: 7.7%; p < 0.05). This study adds to the understanding of how parents may influence vaccination uptake by demonstrating the effect of knowledge and the parental attitudes towards HPV vaccination across three countries.