Table 3. HIV-hepatitis B or C co-infection and not co-infected clusters with high rates identified by SaTScan discrete Poisson method, District of Columbia.

Co-Infection Clusters
Cluster numbers	HIV	Observed Cases	Expected cases	Relative Risk	p value
Cluster 1	82	1508	1018	2.38	0
Cluster 2	80	28	13	2.16	0.15
Cluster 3	103	69	51	1.36	0.98
Not Co-Infected Clusters
Cluster 1	151	130	1	128.75	0
Cluster 2	104	1790	979	2	0
Cluster 3	158	275	79	3.55	0
Cluster 4	86	1490	1108	1.4	0
Cluster 5	88	506	365	1.41	0
Cluster 6	93	900	710	1.29	0
Cluster 7	88	158	103	1.55	0.001
Cluster 8	62	150	102	1.48	0.008