neastsp: Breast cancer mortality in the Northeastern United States

In jpfrench81/neastbenchmark: Benchmark Data for Disease Clusters

Breast cancer mortality in the Northeastern United States

Description

A SpatialPolygonsDataFrame-class object containing data related to breast cancer mortality in the Northeastern United States. The data include several variables observed for 245 counties (or similar) as well polygon information defined using longitude/latitude coordinates in the WGS84 coordinate system. The following variables are included in the object:

• id: A name-based id for each county.

• cases: The number of breast cancer mortality cases between 1988-1992.

• population: The number of residents in the county based on 1990 U.S. census results.

• x: An x coordinate of a centroid associated with each county provided by Kulldorff et al. (2003). See Details.

• y: A y coordinate of a centroid associated with each county provided by Kulldorff et al. (2003). See Details.

Details

The x and y coordinates define centroids associated with each county. The coordinates were provided by Kulldorf et al. (2003). They are appropriate for computing standard Euclidean intercentroid distance between counties but are not consistent with the polygon geometry of the data set. The coordinate system of these coordinates is unknown.

Alternative centroids for the geometry can be obtained through the labpt of each polygon using the code below.

pts_list <- lapply(X = neastsp@polygons, FUN = slot, name = "labpt")
pts <- do.call(rbind, pts_list)

References

Martin Kulldorff, Eric J. Feuer, Barry A. Miller, Laurence S. Freedman; Breast Cancer Clusters in the Northeast United States: A Geographic Analysis, American Journal of Epidemiology, Volume 146, Issue 2, 15 July 1997, Pages 161–170, https://doi.org/10.1093/oxfordjournals.aje.a009247

Examples

if (require(sp)) {
data(neastsp)
plot(neastsp)
spplot(neastsp, "cases")
}

jpfrench81/neastbenchmark documentation built on July 26, 2023, 3:07 p.m.