I get different disease rates when I use my state or county health departments health statistics Web site or the CDC WONDER site. Why?
Differences in disease rates found through different public health sources are probably due to a combination of the effects of different disease rate calculation methods and variations in population estimates. The source for the mortality data used in our maps is the National Vital Statistics System maintained at CDC’s National Center for Health Statistics and the source for the population data is the U.S. Census Bureau. These are the same sources used by WONDER and the probable sources for other state or county mortality data. Generally, mortality data are consistent from source to source. Population estimates may vary depending on their date of acquisition, since different intercensal or postcensal versions may have slight differences in population counts at the county level because the US Census Bureau refigures the estimates every few years and then revises them after the next census. These differences in the population estimates are, even for minority groups in low population area
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- I get different disease rates when I use my state or county health departments health statistics Web site or the CDC WONDER site. Why?
