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Table 2 Characteristics of the significant (p < 0.05) high- and low-risk clusters in Great Britain, as identified by the spatial scan statistic based on a Bernoulli probability model and using a circular scanning window to include 50% of the population at risk (as illustrated in Figure 4)

From: Classical sheep scrapie in Great Britain: spatial analysis and identification of environmental and farm-related risk factors

Cluster Observed Cases Expected Cases Total holdings in cluster Relative risk P-value
Most likely cluster 104 43 216 2.892 0.001
Secondary cluster 2 37 186 0.049 0.001