Why is death rate per 100,000 instead of per 1000?
Due to the small numbers and rates generated death rates are best calculated per 100,000 rather than per 1000.

Why is death rate for children less than one not the same as the infant mortality rate?
This is because they are caluculated differently. The death rates for children less than 1 uses the population data provided by the U.S. census as the denominator, where as the infant mortality rate is calculated using the annual number of live births as the denominator.

Why doesn't the mapping page map rates less than one?
The maps generated take the rate and rounds it up or down according to the rate. Rates above .50 are coded into the 1-4 group and rates less than .50 are coded as a zero. To get the real rates please generate the frequency and rate in the "create a table" page selecting all counties and other characteristics as desired.

Why can't I generate maps for the rates of live births when I choose either ethnicity or marital status?
Due to the missing population denominator, crude birth rates cannot be calculated for these specific groups. Only frequency maps are allowed for these conditions.

Why do I get a N/A sometimes for the rate?
This is due to missing denominators in the rate calculation. This will always occur for the unknown category, marital status, and ethnicity when live birth is the indicator chosen.
Other times this will occur when there were no denominator (live births) for the selection chosen, the frequency of the characteristic chosen will always be zero in this case and the rate can be seen as zero.

Why do I get N/A sometimes for the 95% confidence intervals?
Users will see an N/A for the 95% confidence intervals when the rate is either N/A or equals zero.

Why can't I generate a map that maps the rates for zip codes?
This is due to either the denominator missing, population statistics are not available by zip code level, or if live births is the denominator then the rates are unstable and are not appropriate.

Why the selection total is less than the state total even if I selected all the zip codes listed? Why the zip code I am looking for is not in the selectable list?
See here

Who do I contact for more analysis?
Please contact the Division of Biostatistics and Health GIS for further information.