Tuesday, May 11, 2004 - 2:15 PM
5243

Hepatitis A Vaccine Uptake in San Diego County

Erin Callahan1, Mark H. Sawyer2, K. Michael Peddecord2, Michelle Picardal2, Robert Vryheid2, Nancy Fink2, Wendy Wang2, Michelle Deguire2, Kathe Gustafson2, and Sandy Ross2. (1) Graduate School of Public Health, San Diego State University, 5500 Campanile Drive, MC 4161, San Diego, CA, USA, (2) San Diego Immunization Program, County of San Diego Health and Human Services Agency, PO Box 85222, Mail Stop P511B, 3851 Rosecrans Street, San Diego, CA, USA


BACKGROUND:
In 1999, the Advisory Committee on Immunization Practices (ACIP) recommended hepatitis A (HAV) vaccination for children Ан2 years of age in selected communities including California.

OBJECTIVE:
1) Obtain current HAV immunization coverage rates among 3-17 year olds.
2) Examine factors likely to predict child and adolescent HAV immunization in San Diego County.

METHOD:
The San Diego Immunization Program conducted a random digit dialing telephone survey in 2003 that included 3-17 year old children. Parents of 1,455 children were interviewed about their child's hepatitis A vaccination status. Vaccination dates are verified using an immunization registry and by contacting medical providers. Three age cohorts were analyzed 1) age > 2 years at time of 1995 vaccine licensure, adolescents 11-17.9 years; 2) age Ан 2 years at vaccine licensure before 1999 recommendations, children age 7-10.9; and 3) age Ан 2 years following 1999 ACIP recommendations, age 3-6.9 years.

RESULT:
This preliminary analysis includes data from 747 interviews for which respondents had an available immunization record at the time of the survey. Non-provider-verified coverage rates for one dose of HAV were 45.3% for adolescents, 59.9%, for children 7-10.9 years, and 62.9% for children 3-6.9 years. Odds of receiving the first HAV vaccine are 51% less among adolescents compared to children age 3-6.9 years (p<0.0001). Second dose coverage was 28.8% among adolescents, 38.9% in children 7-10.9, and 46.2% in children 3-6.9 years. Only 30.1% of respondents reported knowledge of HAV vaccine recommendations.

CONCLUSION:
Among two year olds eligible for immunization following the 1999 ACIP recommendations, the majority of children have received at least one HAV vaccine but only half have completed the regimen. Interventions targeting parents and providers of children and adolescents that encourage hepatitis A vaccination are needed.

LEARNING OBJECTIVES:
1) Understand current HAV vaccination coverage.
2) Identify factors that influence the receipt of HAV vaccination

See more of Hepatitis A Vaccination among Children
See more of The 38th National Immunization Conference