Table 1

Regions detected as the most likely cluster by three procedures. Regions detected as the most likely cluster by the circular scan, the flexible scan and Duczmal and Assunção's scan, with the maximum length of cluster set to be K = 15 for the simulated random sample from the cluster model C where the hot spot cluster is assumed to be the set of connected four regions {14, 15, 26, 27} with the assumed relative risk θ = 3.0. For details, see text.
region no.
 population
 observed no. cases
 expected no. cases
 relative risk estimated (true)
 Log likelihood ratio (LLR) and estimated relative risk for the most likely cluster










Circular
 Flexible
 Duczmal et al.
14
 319,687
 14
 3.794
 3.69 (3.0)
 *
 *
 *
15
 529,485
 21
 6.283
 3.34 (3.0)
 *
 *
 *





LLR = 20.1






= 3.47

26
 139,077
 6
 1.650
 3.64 (3.0)
*
 *
27
 165,564
 6
 1.964
 3.05 (3.0)
*
 *
33
 105,899
 4
 1.257
 3.18 (1.0)
*
 *






LLR = 29.7






= 3.41
24
 466,347
 8
 5.534
 1.44 (1.0)

*
31
 197,677
 3
 2.346
 1.27 (1.0)

*
32
 349,050
 5
 4.142
 1.20 (1.0)

*
48
 58,635
 1
 0.696
 1.43 (1.0)

*
54
 3,808
 1
 0.045
 22.12(1.0)

*
69
 119,575
 3
 1.419
 2.11 (1.0)

*
77
 177,742
 5
 2.109
 2.37 (1.0)

*
78
 125,127
 2
 1.485
 1.34 (1.0)

*
90
 194,866
 5
 2.312
 2.16 (1.0)

*
110
 21,535
 1
 0.256
 3.91 (1.0)

*







LLR = 31.8







= 2.41

Tango and Takahashi International Journal of Health Geographics 2005 4:11   doi:10.1186/1476-072X-4-11

Open Data