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Table 2 Description of the simulated alternative cluster scenarios

From: Detection of clusters of a rare disease over a large territory: performance of cluster detection methods

 

"Small Clusters"1

"Moderate Clusters"1

"Large Clusters"1

 

#1

#2

#3

#4

#5

#6

#7

#8

#9

 

Linear

U-shaped

Compact

Linear

U-shaped

Compact

Linear

U-shaped

Compact

 

No. LZ = 6

No. LZ = 10

No. LZ = 8

No. LZ = 7

No. LZ = 7

No. LZ = 11

No. LZ = 12

No. LZ = 16

No. LZ = 13

Population (1999, all ages)

      

Total

147794

153067

136704

360752

351089

404176

948557

954460

913030

Mean

24632.3

15306.7

17088.0

51536.0

50155.6

36743.3

79046.4

59653.8

76085.8

SD

35843.1

15350.6

16754.8

100719.4

101328.7

81488.4

223805.2

194750.3

224749.6

Min

6519

3963

6519

8267

7177

2949

5202

2259

4051

Max

97315

57355

57355

279841

279841

279841

788887

788887

788887

Expected No. AL

20.8

21.4

19.7

44.9

44.0

50.1

115.4

116.8

113.6

  1. No. AL: number of childhood acute leukemia; No. LZ: number of living zones in the cluster
  2. 1 "small", "moderate" and "large" clusters are clusters with about 20, 45 and 115 cases of childhood acute leukemia over the period 1990-2006, respectively.