Factors Related to Satisfaction with Decision-making Regarding Human Papillomavirus Vaccination Behavior among Female University Students in Japan

Introduction: Cervical cancer is the fourth most common cancer among women worldwide. Most cervical cancers are caused by persistent infection with human papillomavirus (HPV) acquired through sexual contact. Decision-making is the process of choosing among several options, and a better decision is one that the people engaged in the decision-making process express satisfaction with. Despite that HPV infection is associated with sexual behavior, no studies in Japan on HPV vaccination decision-making that include perspectives on sexuality exist. This study aimed to determine the factors that influence satisfaction with decision-making concerning HPV vaccination among female university students in Japan. Methods: The cross-sectional study was carried out by an anonymous self-administered questionnaire mail survey of 1988 female university students in Japan between April and July 2021. Of them, 301 agreed to participate in the survey. After the exclusion of those with missing data, the analysis included 252 (12.7%) students. We summarized descriptive statistics in terms of characteristics, satisfaction with decision-making regarding HPV vaccination, HPV vaccination behavior, knowledge, attitude about HPV vaccination, influencing factors, and perceptions and behaviors related to sexuality. Furthermore, we conducted multivariate analyses to investigate factors that influence satisfaction with decision-making regarding HPV vaccination. Results: Of the 252 participants, 102 (40.5%) were satisfied with their decisions regarding HPV vaccination. After adjustment for confounding factors, the multivariable-adjusted odds ratios (95% confidence intervals) for factors associated with satisfaction in decision-making regarding HPV vaccination were as follows: being vaccinated (vs. non-vaccinated) 5.46 (2.51-11.89), having high knowledge scores (vs. per 1 point) 1.09 (1.01-1.17), and having awareness about the risk of contracting sexually transmitted infections (STIs) via sexual intercourse (vs. per 1 point) 0.83 (0.72-0.96). Conclusions: Being vaccinated, having higher knowledge scores, and having lower awareness regarding the risk of STIs were associated with satisfied decision-making concerning HPV vaccination. Providing younger people with correct information about cervical cancer, HPV vaccines, and STI prevention contributes to increased satisfaction with their HPV vaccination decisions.