Estimating human papillomavirus vaccination coverage among young women in Victoria and reasons for non-vaccination

Background Adult Australian women aged 18 to 26 years were offered human papillomavirus (HPV) vaccine in a mass catch up campaign between 2007 and 2009. Not all doses administered were notified to Australia’s HPV vaccine register and not all young women commenced or completed the vaccine course. Methods: We surveyed vaccine age-eligible women as part of the Victorian Population Health Survey 2011–2012, a population based telephone survey, to ascertain self-reported vaccine uptake and reasons for non-vaccination or non-completion of vaccination among young women resident in the state of Victoria, Australia. Results: Among 956 women surveyed, 62.3 per cent (57.8–66.6%) had been vaccinated against HPV and coverage with three doses was estimated at 53.7 per cent (49.1–58.2%). These estimates are higher than register-based estimates for the same cohort, which were 57.8 per cent and 37.2 per cent respectively. A lack of awareness about needing three doses and simply forgetting, rather than fear or experience of side effects, were the most common reasons for failure to complete all three doses. Among women who were not vaccinated, the most frequent reasons were not knowing the vaccine was available, perceiving they were too old to benefit, or not being resident in Australia at the time. Conclusions: It is likely that at least half of Victoria’s young women were vaccinated during the catch-up program. This high level of coverage is likely to explain the marked reductions in HPV infection, genital warts and cervical disease already observed in young women in Victoria.