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Comparison of NIS and NHIS/NIPRCS vaccination coverage estimates. National Immunization Survey. National Health
D L Bartlett1, T M Ezzati-Rice, S Stokley
1National Immunization Program (Bartlett, Stokley, Zhao), Centers for Disease Control and Prevention, Atlanta, Georgia, USA
Insights
The National Immunization Survey (NIS) and the National Health Interview Survey (NHIS) provide similar vaccination coverage estimates for young children. The NHIS/NIPRCS validates NIS findings, confirming its reliability for national vaccination coverage data.
Area of Science:
- Public Health
- Epidemiology
- Survey Methodology
Background:
- The National Immunization Survey (NIS) and National Health Interview Survey (NHIS) are key sources for national childhood vaccination coverage estimates.
- NIS utilizes telephone surveys, while NHIS employs face-to-face interviews, with NIS potentially having coverage bias due to excluding non-telephone households.
- The National Immunization Provider Record Check Study (NIPRCS) complements the NHIS data collection.
Purpose of the Study:
- To evaluate the accuracy of vaccination coverage estimates derived from the NIS.
- To compare NIS national estimates with data from the NHIS/NIPRCS for children aged 19–35 months.
- To validate the NIS methodology using a different data collection approach.
Main Methods:
- Comparative analysis of national vaccination coverage estimates.
- Utilized data from the NIS and NHIS/NIPRCS for the years 1995 and 1996.
- Focused on children aged 19 months to 35 months.
Main Results:
- Vaccination coverage estimates from the NIS were found to be similar to those obtained from the NHIS/NIPRCS.
- The two survey methods yielded comparable results for the study period.
Conclusions:
- The findings from the NHIS/NIPRCS support the validity of the NIS estimates.
- The NIS is a reliable tool for assessing national vaccination coverage in young children.
Background:
The National Immunization Survey (NIS) and the National Health Interview Survey (NHIS) produce national coverage estimates for children aged 19 months to 35 months. The NIS is a cost-effective, random-digit-dialing telephone survey that produces national and state-level vaccination coverage estimates. The National Immunization Provider Record Check Study (NIPRCS) is conducted in conjunction with the annual NHIS, which is a face-to-face household survey. As the NIS is a telephone survey, potential coverage bias exists as the survey excludes children living in nontelephone households.
Methods:
To assess the validity of estimates of vaccine coverage from the NIS, we compared 1995 and 1996 NIS national estimates with results from the NHIS/NIPRCS for the same years.
Results:
Both the NIS and the NHIS/NIPRCS produce similar results.
Conclusion:
The NHIS/NIPRCS supports the findings of the NIS.
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