1. Effectiveness of HPV vaccination against the development of high-grade cervical lesions in young Japanese women.
- Author
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Shiko Y, Konno R, Konishi H, Sauvaget C, Ohashi Y, and Kakizoe T
- Subjects
- Adult, Cross-Sectional Studies, Female, Humans, Immunization Programs, Incidence, Japan epidemiology, Papillomavirus Infections epidemiology, Papillomavirus Vaccines administration & dosage, Prevalence, Treatment Outcome, Uterine Cervical Neoplasms classification, Uterine Cervical Neoplasms virology, Young Adult, Uterine Cervical Dysplasia classification, Uterine Cervical Dysplasia virology, Papillomaviridae immunology, Papillomavirus Infections prevention & control, Papillomavirus Vaccines immunology, Uterine Cervical Neoplasms prevention & control, Vaccination, Uterine Cervical Dysplasia prevention & control
- Abstract
Background: Although more than 10 years have passed since HPV vaccination was implemented, first as an interim programme (Emergent vaccine promotion programme) in November 2010, followed by incorporating into the National Immunization Programme in April, 2013 and suspended in June 2013, limited studies have investigated the HPV vaccine effectiveness against high-grade cervical lesions in Japan., Methods: We collected the matched data of the results of cervical biopsy and history of vaccination from the Japan Cancer Society database. The subjects were women aged 20 to 29 years screened for cervical cancer between April, 2015 and March, 2017, and with information on HPV vaccination status. We estimated the relative risk of developing high-grade cervical lesions in vaccinated subjects using Poisson regression as compared to unvaccinated subjects., Results: Among the 34,281 women screened, 3770 (11.0%) were vaccinated. The prevalence of CIN2+ was statistically significantly lower in the vaccinated women as compared to the unvaccinated women (Vaccine Effectiveness (VE) =76%; RR = 0.24, 95% CI:0.10-0.60). High VE against CIN3+ was also observed (91%; RR = 0.09, 95% CI:0.00-0.42)., Conclusion: Women aged 20-29 years who received at least one dose of HPV vaccine had a significantly lower risk of high-grade cervical lesions than those not vaccinated. In Japan, HPV vaccination should be resumed in order to reduce the incidence of cervical cancer.
- Published
- 2020
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