ClusterSeer can extrapolate population-at-risk counts from census data. This feature can be used in Kulldorff's Scan, Rogerson's, and CuSum methods.
ClusterSeer offers two extrapolation methods, step and linear extrapolation.
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The population-at-risk count is assumed equal to the immediately preceding census count. It will change with the next provided census value. |
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The population-at-risk count is estimated assuming a linear change in population between the two nearest census figures. Population-at-risk values are estimated along the line connecting the two census values. |
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for both methods |
Dates before the first census value will be set to the first value. Dates after the final census value will be set to the last value. |
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Census dates are specified using a yearly precision. The extrapolation will be estimated at the temporal scale used for the case data (daily, weekly, monthly, or yearly).
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