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Figure 2 | International Journal of Health Geographics

Figure 2

From: Accounting for regional background and population size in the detection of spatial clusters and outliers using geostatistical filtering and spatial neutral models: the case of lung cancer in Long Island, New York

Figure 2

Geographic distribution and spatial variability of female lung cancer. The fill color in each ZIP code represents the SMR, with green indicating relatively low SMR and purple representing relatively high SMR (categories correspond to deciles of the histogram of rates). From these rates, a population-weighted semivariogram is computed in four directions. The semivariogram model (solid line) is used to filter the noise and short-range variability of observed SMR, yielding a smooth map of SMR local means (regional background)

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