Spatial Scan Statistics Adjusted for Multiple Clusters

Table 3

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 repalcement method. The buffer size is the number of neighboring counties. The true cluster consisting of 1, 4 or 16 counties is 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	0.008	0.009	0.010	0.018	0.012	0.011	0.011	0.012	0.015
5	0.01	0.008	0.009	0.010	0.018	0.011	0.013	0.011	0.013	0.017
10	0.01	0.009	0.010	0.009	0.019	0.012	0.014	0.012	0.014	0.017
0	0.05	0.047	0.054	0.046	0.062	0.057	0.058	0.058	0.055	0.071
5	0.05	0.048	0.054	0.047	0.065	0.057	0.063	0.055	0.058	0.076
10	0.05	0.050	0.054	0.050	0.066	0.060	0.069	0.060	0.064	0.082