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Developing a surveillance system of sub-county data: Finding suitable population thresholds for geographic aggregations
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6 2020
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Source: Spat Spatiotemporal Epidemiol. 33:100339
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Alternative Title:Spat Spatiotemporal Epidemiol
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Description:The Centers for Disease Control and Prevention's National Environmental Public Health Tracking Program created standardized sub-county geographies that are comparable over time, place, and outcomes. Expected census tract-level counts were calculated for asthma emergency department visits and lung cancer. Census tracts were aggregated for various total population and sub-population thresholds, then suppression and stability were examined. A total of 5,000 persons was recommended for the more common outcome scheme and a total of 20,000 persons was recommended for the rare outcome scheme. Health outcomes with a median case count of 17.0 cases or higher should produce stable estimates at the census tract level. This project generated recommendations for three sub-county geographies that will be useful for surveillance purposes: census tract, a more common outcome aggregation scheme, and a rare outcome aggregation scheme. This methodology can be applied anywhere to aggregate geographic units and produce stable rates at a finer resolution.
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Pubmed ID:32370944
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Pubmed Central ID:PMC8841954
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