Office of Disease Prevention and Health Promotion

IID-7.6 Data Details

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IID-7.6 Maintain an effective coverage level of 1 dose of varicella vaccine among children by age 19 to 35 months

About the Data: National

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

Data Source:

National Immunization Survey (NIS); Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases and National Center for Health Statistics (CDC/NCIRD and CDC/NCHS)

Changed Since the Healthy People 2020 Launch:

Yes

Measure:

percent

Baseline (Year):

90.2 (2012)

Target:

90.0

Target-Setting Method:

Maintain consistency with national programs, regulations, policies, and laws.

Target-Setting Method Justification:

Ninety-percent coverage targets have allowed for dramatic control of vaccine-preventable diseases in the United States. Morbidity has declined at least 99 percent for most diseases from levels in the 20th century. Achieving and maintaining 90 percent coverage is an important way of maintaining herd immunity for this population.

Numerator:

Number of children aged 19 to 35 months receiving at least 1 dose of the varicella antigen

Denominator:

Number of children aged 19 to 35 months

Comparable Healthy People 2010 Objective:

Retained from HP2010 objective

Questions Used to Obtain the National Baseline Data:

From the 2013 National Immunization Survey Provider-Immunization History Questionnaire:

[NUMERATOR:]

Specify month, day, and year that each vaccine was given, either by the office or another provider, and type of vaccine, as documented in the records.

Data Collection Frequency:

Annual

Methodology Notes:

The National Immunization Survey (NIS) uses a quarterly, random-digit-dialed sample of telephone numbers to reach households with children aged 19–35 months in the 50 states and selected local areas and territories, followed by a mail survey sent to the children's vaccination providers to collect vaccination information. Data are weighted to represent the population of children aged 19–35 months, with adjustments for households with multiple telephone lines and mixed telephone use (landline and cellular), household nonresponse, and exclusion of households without telephone service. Beginning in 2011, surveys include landline and cellular telephone households.

This measure tracks the proportion of children aged 19 to 35 months receiving at least 1 dose of the varicella (chickenpox) vaccine.

About the Data: State

Description of the data source, numerator, denominator, survey questions, and other relevant details about the state-level data.

Data Source:

Measure:

percent

Numerator:

Number of children aged 19 to 35 months receiving at least 1 dose of the varicella antigen

Denominator:

Number of children aged 19 to 35 months

Questions Used to Obtain the State Data:

From the 2013 National Immunization Survey Provider-Immunization History Questionnaire:

[NUMERATOR:]

Specify month, day, and year that each vaccine was given, either by the office or another provider, and type of vaccine, as documented in the records.

Data Collection Frequency:

Annual

Methodology Notes:

This measure tracks the proportion of children aged 19 to 35 months receiving at least 1 dose of the varicella (chickenpox) vaccine.

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, 2008 through 2011 data were revised to correct errors in programming, in particular the estimates by sex and country of birth. The baseline estimate for the total population and target remained the same. In 2015, the baseline year was revised from 2008 to 2012 due to expanding the sampling frame from landline phones only to a dual frame sample including landline and cell phones. The baseline statement was changed from "90.7 percent of children aged 19 to 35 months in 2008 received at least 1 dose of the varicella antigen" to "90.2 percent of children aged 19 to 35 months in 2012 received at least 1 dose of the varicella antigen." The target remains unchanged.

References

Additional resources about the objective

CDC. National and State Vaccination Coverage Among Children Aged 19--35 Months --- United States, 2010. MMWR 2011:60(34):1157-1163.
https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6034a2.htm
CDC. National, State, and Local Area Vaccination Coverage Among Children Aged 19--35 Months --- United States, 2008. MMWR 2009: 58(33);921-926.
https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5833a3.htm
CDC. National, State, and Local Area Vaccination Coverage Among Children Aged 19--35 Months --- United States, 2009. MMWR 2010;59(36):1171-1177.
https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5936a2.htm
CDC. National, State, and Local Area Vaccination Coverage Among Children Aged 19–35 Months — United States, 2011. MMWR 2012;61(35):689-696.
https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6135a1.htm