Human Papillomavirus Vaccine Administration Trends among Commercially Insured US Adults Aged 27-45 Years before and after Advisory Committee on Immunization Practices Recommendation Change, 2007-2020

Abstract

Importance: In 2019, the Advisory Committee on Immunization Practices (ACIP) recommended patient-clinician shared decision-making for human papillomavirus (HPV) vaccination in adults aged 27 to 45 years. Less is known about the HPV vaccine administration trends in this age group before and after this recommendation update. Objective: To examine the association between the ACIP recommendation update and the HPV vaccine administration among US adults aged 27 to 45 years. Design, Setting, and Participants: This large commercial claim-based retrospective cohort study used the Optum Clinformatics database for validated claims from January 1, 2007, through December 31, 2020. A total of 22600520 US adults aged 27 to 45 years without previous HPV vaccination claims during the study and enrollment period were included. Main Outcomes and Measures: The first-appearing HPV vaccination claim per individual was defined as a new HPV vaccine administration. Interrupted time-series analyses were conducted to assess the association between the ACIP update and the quarterly vaccine administration rate change. The annual rate trends across race and ethnicity groups and the proportions of vaccination cases by sub-age groups and valent types were also estimated. Vaccine administration trends were assessed by race and ethnicity in this age group because HPV vaccination trends were found to differ by race and ethnicity in the initially eligible population. Results: Among 22600520 final study participants, the majority were men (50.9%) and non-Hispanic White (53.4%), and the mean (SD) age when first observed was 34.6 (5.8) years. In women, the ACIP update was associated with an immediate increase in vaccine administration rate (coefficient β2, 40.18 per 100000 persons; P =.01) and an increased slope (coefficient β3, 9.62 per 100000 persons per quarter; P =.03) over time postupdate. The ACIP update was only associated with an immediate increase in vaccine administration in men (coefficient β2, 27.54; P