Table 3

Results of Episcan tests that allow overlap among identified statistically significant clusters.

Study Region
 Units of analysis
 Highly significant clusters, p ≤ 0.01
 Significant clusters, 0.01 < p ≤ 0.05
 Maximum Relative Risk
 Accepted contributing clusters




Count
 Population range
 Count
 Population range



RC A
 Set 11
 183
 2914, 33009
 810
 1496, 33463
 2.22
 269

Set 22
 50
 9074, 32919
 186
 3729, 33661
 1.96
 126
RC B
 Set 11
 0
 n.a.
 2
 11775, 13697
 1.50
 0

Set 22
 0
 n.a.
 1
 15599
 1.44
 0

1 Maximum unit population of 1,000.

2 Maximum unit population of 2,000

Accepted contributing clusters have a p ≤ 0.05, RR ≥ 1.7 and birth population ≥ 1000.

Van Meter et al. International Journal of Health Geographics 2008 7:26   doi:10.1186/1476-072X-7-26