340. Pediatric seasonal influenza vaccination coverage trends (2007-2012) in privately insured population
Session: Poster Abstract Session: Influenza Vaccine in Children and Adults
Thursday, October 3, 2013
Room: The Moscone Center: Poster Hall C
  • 340_IDWPOSTER_1024x495.pdf (1.7 MB)
  • Background:

    In 2008, the US Advisory Committee on Immunization Practices (ACIP) recommended universal pediatric influenza vaccination for children ≥ 6 months of age. CDC monitors overall influenza vaccination coverage based on systematic surveys, but little is known about trends in pediatric influenza vaccination by private payers.


    To describe seasonal influenza vaccination trends among commercially insured children(≤ 18 y.o.) in the U.S., we conducted a retrospective observational cohort study using administrative claims data from a large national insurer. Trends were examined based on current procedural terminology and generic product identifier codes for seasonal influenza vaccines during 2007-08 through 2011-12 seasons. Denominators were the number of children enrolled in the plan for 24 months: 12 months prior and 12 months after 1 July. Office visits were calculated 12 months prior to 1 July.


    The denominators fluctuated by season and ranged between n=1,277,502 and n=1,363,087. Children <24 months had the highest likelihood to be vaccinated against influenza (47%-55%), and this likelihood decreased with older age (Figure 1).

    Geographically, children in the Northeast had the highest and children in the West had the lowest likelihood to be vaccinated. However, the differences by region were small (6-8 percentage points), Figure 2.

    Children with frequent office visits had higher likelihood of seasonal vaccination than those with few office visits (Figure 3). However, the likelihood of vaccination in those with ≥ 6 office visits was still low: 25%-35%. Only 2.4%-5.3% of children with no office visit were vaccinated against influenza.


    Younger children had a higher likelihood of influenza vaccination than older children. Rates of pediatric vaccination against seasonal influenza remain relatively low. Alternative venues for delivering seasonal influenza vaccines to children should be considered. 

    Figure 1. Percentage vaccinated children by age.

    Figure 2. Percentage of vaccinated children by region.

    Figure 3. Percentage of vaccinated children, by the number of office visits the year prior to vaccination season.

    Evgeniya Antonova, MS, PhD1, David Kern, MS2, Stan Block, MD3,4, Herve Caspard, MD, ScD5, Ozgur Tunceli, PhD2 and Christopher Ambrose, MD5, (1)Medimmune, LLC, Gaithersburg, MD, (2)Health Core, Inc, Wilmington, DE, (3)University of Louisville, Louisville, KY, (4)University of Kentucky, Lexington, KY, (5)MedImmune, LLC, Gaithersburg, MD


    E. Antonova, MedImmune, LLC: Employee, Salary

    D. Kern, None

    S. Block, None

    H. Caspard, MedImmune: Employee, Salary

    O. Tunceli, None

    C. Ambrose, MedImmune: Employee, Salary

    Findings in the abstracts are embargoed until 12:01 a.m. PST, Oct. 2nd with the exception of research findings presented at the IDWeek press conferences.