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Table 5 Comparison of the Gini coefficient and the hierarchical cluster reporting criteria using the simulated cluster configurations in the Northeastern USA

From: Using Gini coefficient to determining optimal cluster reporting sizes for spatial scan statistics

  (A) Urban centre with small rural clusters (B) Rural centre with small urban clusters
  One large cluster Three small clusters One large cluster Three small clusters
# counties 57 11 40 6
Total population in clusters (%) 4,344,150 (14.7) 681,984 (2.3) 2,736,674 (9.3) 780,451 (2.6)
Relative risk 1.18 1.46 1.23 1.43
Gini     
 1 90 % 0 76 % 15 %
 2 1 % 12 % 13 % 28 %
 3 0 85 % 4 % 56 %
 4+ 9 % 2 % 7 % 1 %
Hierarchical     
 1 100 % 2 % 100 % 64 %
 2 0 52 % 0 25 %
 3 0 46 % 0 11 %
 4+ 0 0 0 0