Table 1.

1983–2003 Cluster Results

Cluster	Dimension	Type	Radius (km)	Start	End	P-Value	Relative Risk
1	Temporal	Low	All	1999/1/1	2003/12/31	0.001	0.27
2	Spatial	Low	6.86	1983/1/1	2003/12/31	0.001	0.10
3	Spatial	High	6.02	1983/1/1	2003/12/31	0.001	3.43
4	Space/Time	High	6.50	1983/1/1	1987/12/31	0.001	2.38
5	Space/Time	High	6.39	1992/1/1	1995/12/31	0.001	3.00