Abstract: Immunization Rates among Oregon Medicaid and WIC Participants (43rd National Immunization Conference (NIC))

PS81 Immunization Rates among Oregon Medicaid and WIC Participants

Tuesday, March 31, 2009
Grand Hall area
Steve Robison
Susan Woodbury
Charles A. Gallia
Susan Arbor

Through an Oregon Immunization and WIC partnership, Immunization Information System-based immunization forecasting is available at all WIC visits. OIP also partners with the Division of Medical Assistance Programs (DMAP) to determine immunization rates for children on Medicaid.

To explore associations between Medicaid and WIC enrollment and up-to-date rates.

For two year olds born in Oregon in 2005, ALERT, WIC and DMAP participation were assessed as of 1/1/2008. Medicaid status was assessed for a minimum of one year enrollment by age two. Population-based immunization rates (UTD) for the 4:3:1:3:3:1 series were determined for WIC and DMAP separately and together.

For a 4:3:1:3:3:1 series with recommended spacing, children enrolled in Medicaid had a 2007 UTD rate of 77.9%; WIC enrolled children had a 77.6% UTD rate; and children enrolled in both Medicaid and WIC had a UTD rate of 81.4%. In comparison, the statewide rate for all children was 74.1%. In contrast to overall rates, children enrolled exclusively in Medicaid, not WIC, had a 62.0% UTD rate and children enrolled exclusively in WIC, not Medicaid, had a 73.5% UTD rate.

In Oregon, a combination of WIC and Medicaid enrollment significantly increased the likelihood that children will receive all recommended vaccinations. Findings reinforce the value of Oregon partnerships between Immunizations, WIC and DMAP.
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