Spatial Scan Statistics Adjusted for Multiple Clusters

Table 1

Estimated type I error probabilities when testing the second most likely cluster when there is only one true cluster present, using the most likely cluster removing method. The buffer size is the number of neighboring counties removed together with the true cluster. The true clusters consist of 1, 4 or 16 counties located in an urban, rural or mixed population area, respectively, as described in the text.

Buffer size	Controlled	Urban			Rural			Mixed
	$\alpha$	1	4	16	1	4	16	1	4	16
0	0.01	0.007	0.007	0.009	0.017	0.010	0.009	0.010	0.011	0.010
2	0.01	0.007	0.007	0.009	0.016	0.008	0.009	0.011	0.009	0.009
5	0.01	0.008	0.008	0.009	0.016	0.010	0.009	0.009	0.010	0.009
10	0.01	0.011	0.007	0.008	0.016	0.009	0.010	0.010	0.009	0.009
50	0.01	0.010	0.010	0.009	0.008	0.010	0.010	0.010	0.009	0.011
0	0.05	0.047	0.043	0.042	0.059	0.052	0.048	0.047	0.049	0.051
2	0.05	0.044	0.044	0.042	0.059	0.051	0.049	0.050	0.047	0.050
5	0.05	0.045	0.045	0.040	0.058	0.052	0.048	0.048	0.047	0.050
10	0.05	0.053	0.048	0.040	0.057	0.051	0.050	0.050	0.048	0.052
50	0.05	0.054	0.047	0.045	0.053	0.048	0.051	0.051	0.052	0.056