• Jean-François Laprise, Harrell W Chesson, Lauri E Markowitz, Mélanie Drolet, Dave Martin, Élodie Bénard, and Marc Brisson.
• Centre de recherche du CHU de Québec-Université Laval, Québec City, Québec, Canada (J.L., M.D., D.M., É.B.).
• Ann. Intern. Med. 2020 Jan 7; 172 (1): 22-29.

BackgroundIn the United States, the routine age for human papillomavirus (HPV) vaccination is 11 to 12 years, with catch-up vaccination through age 26 years for women and 21 years for men. U.S. vaccination policy on use of the 9-valent HPV vaccine in adult women and men is being reviewed.ObjectiveTo evaluate the added population-level effectiveness and cost-effectiveness of extending the current U.S. HPV vaccination program to women aged 27 to 45 years and men aged 22 to 45 years.DesignThe analysis used HPV-ADVISE (Agent-based Dynamic model for VaccInation and Screening Evaluation), an individual-based transmission dynamic model of HPV infection and associated diseases, calibrated to age-specific U.S. data.Data SourcesPublished data.Target PopulationWomen aged 27 to 45 years and men aged 22 to 45 years in the United States.Time Horizon100 years.PerspectiveHealth care sector.Intervention9-valent HPV vaccination.Outcome MeasuresHPV-associated outcomes prevented and cost-effectiveness ratios.Results Of Base Case AnalysisThe model predicts that the current U.S. HPV vaccination program will reduce the number of diagnoses of anogenital warts and cervical intraepithelial neoplasia of grade 2 or 3 and cases of cervical cancer and noncervical HPV-associated cancer by 82%, 80%, 59%, and 39%, respectively, over 100 years and is cost saving (vs. no vaccination). In contrast, extending vaccination to women and men aged 45 years is predicted to reduce these outcomes by an additional 0.4, 0.4, 0.2, and 0.2 percentage points, respectively. Vaccinating women and men up to age 30, 40, and 45 years is predicted to cost $830 000, $1 843 000, and $1 471 000, respectively, per quality-adjusted life-year gained (vs. current vaccination).Results Of Sensitivity AnalysisResults were most sensitive to assumptions about natural immunity and progression rates after infection, historical vaccination coverage, and vaccine efficacy.LimitationUncertainty about the proportion of HPV-associated disease due to infections after age 26 years and about the level of herd effects from the current HPV vaccination program.ConclusionThe current HPV vaccination program is predicted to be cost saving. Extending vaccination to older ages is predicted to produce small additional health benefits and result in substantially higher incremental cost-effectiveness ratios than the current recommendation.Primary Funding SourceCenters for Disease Control and Prevention.

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