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IID-18 Data Details

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IID-18 Increase the percentage of children under age 6 years of age whose immunization records are in a fully operational, population-based immunization information system (IIS)

About the Data

Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.

Data Source: 
Immunization Information Systems Annual Report (IISAR); Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (CDC/NCIRD)
Population Estimates; U.S. Census Bureau (Census)
Changed Since the Healthy People 2020 Launch: 
Yes
Measure: 
percent
Baseline (Year): 
75.0 (2008)
Target: 
95.0
Target-Setting Method: 
Projection/trend analysis
Target-Setting Method Justification: 
Trend data from the past 5 years show an increase of 4 to 5 percent per year. The 2009 participation is projected to be at 80 percent. With interoperability between immunization information systems (registries) and an increase in electronic health records, 95 percent is achievable.
Numerator: 

Number of children under 6 years of age with two or more immunizations recorded in the immunization information system

Denominator: 

Number of children under 6 years of age

Comparable Healthy People 2010 Objective: 
Retained from HP2010 objective
Data Collection Frequency: 
Annual
Methodology Notes: 

    55 of 56 CDC immunization information systems awardees (50 states excluding NH, the District of Columbia, and other reporting areas) track immunizations administered to children. "Other reporting areas" are defined as the following five cities: Houston, San Antonio, Chicago, Philadelphia, and New York City. These 5 cities operate separately from their state programs. Data from these cities are not included in the state data.

    The metric includes any vaccine administered to a child before their 6th birthday excluding pandemic influenza vaccination (e.g. influenza A (H1N1)pdm09 vaccination) and travel vaccinations.

    FOR SINGLE DATA YEARS: Percents are calculated based on the resident population of the CDC immunization information systems awardees (50 states, the District of Columbia, and other reporting areas) for the data year involved. For census years (e.g. 2010), population counts enumerated as of April 1 are used. For all other years, populations estimates as of July 1 are used. Postcensal population estimates are used in rate calculations for years after a census year and match the data year vintage (e.g. July 1, 2011 resident population estimates from Vintage 2011 are used as the denominator for 2011 rates). Postcensal population estimates are used in calculations for the years between censuses (e.g. 1991-1999, 2001-2009). Because the city limits of some reporting areas do not correspond to Census county-level estimates, the American Community Survey population estimates are used in calculations for these reporting areas.

Revision History

Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.

Description of Changes Since the Healthy People 2020 Launch: 
In 2014, Population Estimates was added as a data source to reflect measure's population denominator. The data and target were not revised.