Figure 5.

Average cluster detection sensitivity/specificity versus average distance to original point (average distance increases as anonymization level increases). The average sensitivity and specificity of spatial detection (using SaTScan Bernoulli Spatial Model with p-value ≤0.05) of artificially injected clusters of patients is displayed with respect to the average distance that patients in a de-identified data set are moved with respect to their original home addresses. Sensitivity and specificity are calculated using cases from the cluster and control data that were or were not identified properly.