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Table 4 Simulation results for cluster model D (one elliptical cluster, 10% of total area) with a mean survival time of 5

From: Optimizing the maximum reported cluster size in the spatial scan statistic for survival data

  % of cens   Maximum reported cluster size (MRCS) Default Setting
3% 4% 5% 6% 8% 10% 12% 15% 20% 25% 30% 35% 40% 45% 50% Overall
Circular window 10% Frequency 14 3 8 196 256 82 20 41 84 57 36 17 20 6 5   845
Sensitivity 0.017 0.278 0.500 0.669 0.650 0.689 0.700 0.797 0.863 0.974 0.986 0.971 0.992 1.000 1.000 0.730 0.617
PPV 1.000 0.778 0.800 0.970 0.891 0.697 0.553 0.509 0.461 0.410 0.328 0.270 0.239 0.200 0.172 0.728 0.726
30% Frequency 6 3 10 240 365 92 7 35 63 44 11 11 4 5 2   898
Sensitivity 0.011 0.333 0.617 0.653 0.655 0.714 0.714 0.805 0.833 0.920 0.985 1.000 0.958 0.967 1.000 0.699 0.629
PPV 0.833 1.000 0.860 0.989 0.910 0.678 0.568 0.501 0.453 0.385 0.327 0.270 0.212 0.192 0.182 0.807 0.802
50% Frequency 3 0 8 87 415 49 7 37 90 84 9 16 16 7 19   847
Sensitivity 0.003 0.667 0.634 0.659 0.660 0.619 0.766 0.782 0.865 0.926 0.979 0.990 0.929 0.974 0.716 0.612
PPV 0.667 0.767 0.966 0.867 0.694 0.531 0.503 0.425 0.353 0.296 0.270 0.227 0.196 0.176 0.698 0.691
70% Frequency 0 0 2 25 142 9 1 7 25 32 99 32 5 77 40   496
Sensitivity - 0.500 0.640 0.612 0.648 0.333 0.762 0.807 0.823 0.978 0.995 0.967 0.903 0.883 0.807 0.426
PPV - 1.000 0.960 0.768 0.707 0.286 0.491 0.444 0.325 0.329 0.265 0.228 0.191 0.171 0.464 0.437
Elliptical window 10% Frequency 1 5 14 28 67 426 140 101 64 34 15 11 8 4 2   920
Sensitivity 0.004 0.300 0.488 0.667 0.704 0.974 0.973 0.965 0.961 0.976 0.978 0.985 0.958 1.000 1.000 0.931 0.857
PPV 1.000 0.800 0.976 0.966 0.945 0.953 0.817 0.657 0.525 0.404 0.327 0.278 0.229 0.205 0.191 0.820 0.820
30% Frequency 2 2 9 57 68 460 160 96 52 17 8 3 3 2 2   941
Sensitivity 0.006 0.333 0.556 0.670 0.696 0.959 0.959 0.953 0.910 0.951 0.958 0.944 0.944 0.917 1.000 0.912 0.858
PPV 0.500 1.000 0.944 0.994 0.973 0.937 0.819 0.663 0.493 0.405 0.305 0.257 0.226 0.174 0.188 0.847 0.848
50% Frequency 0 3 6 3 54 340 248 134 54 37 11 6 12 4 12   924
Sensitivity 0.222 0.472 0.722 0.735 0.960 0.962 0.969 0.880 0.896 0.864 0.972 0.958 0.958 0.972 0.934 0.864
PPV 0.667 0.944 0.875 0.944 0.939 0.825 0.674 0.473 0.369 0.279 0.265 0.230 0.187 0.182 0.785 0.783
70% Frequency 0 1 12 13 105 301 18 38 21 41 39 30 60 20 34   733
Sensitivity 0.333 0.472 0.500 0.730 0.976 0.759 0.886 0.746 0.850 0.897 0.956 0.986 0.942 0.966 0.893 0.657
PPV 1.000 0.944 1.000 0.981 0.924 0.667 0.594 0.416 0.349 0.290 0.265 0.241 0.204 0.182 0.692 0.690
  1. % of cens, percentage of censoring; PPV, positive predictive value
  2. Cells most often selected as the optimal MRCS are shown in italics