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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.