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Table 6 Simulation results for cluster model F (one irregular cluster, 20% of total area) with a mean survival time of 7

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 20 6 13 27 69 37 57 38 33 45 17 20 37 32 45   496
Sensitivity 0.005 0.141 0.266 0.279 0.360 0.383 0.418 0.490 0.543 0.656 0.697 0.792 0.963 0.966 0.978 0.563 0.285
PPV 0.950 0.750 0.930 0.951 0.966 0.788 0.719 0.673 0.567 0.568 0.460 0.459 0.481 0.434 0.394 0.674 0.663
30% Frequency 20 2 15 12 53 21 70 33 49 55 11 17 43 19 40   460
Sensitivity 0.004 0.154 0.226 0.282 0.373 0.374 0.409 0.501 0.584 0.641 0.769 0.810 0.964 0.931 0.983 0.575 0.267
PPV 0.950 1.000 0.878 0.979 0.973 0.785 0.775 0.678 0.582 0.557 0.511 0.482 0.484 0.411 0.398 0.670 0.663
50% Frequency 41 1 36 27 31 11 135 30 50 39 3 15 59 15 26   519
Sensitivity 0.008 0.154 0.220 0.271 0.360 0.385 0.404 0.474 0.500 0.602 0.667 0.821 0.979 0.903 0.950 0.498 0.263
PPV 1.000 1.000 0.940 0.938 0.967 0.755 0.754 0.637 0.557 0.534 0.453 0.488 0.491 0.411 0.399 0.700 0.698
70% Frequency 66 0 16 4 204 30 106 23 24 37 1 1 10 31 109   662
Sensitivity 0.015 0.226 0.308 0.331 0.382 0.411 0.452 0.583 0.605 0.615 0.769 0.923 0.849 0.924 0.473 0.317
PPV 0.985 0.797 0.764 0.787 0.736 0.743 0.607 0.622 0.496 0.421 0.455 0.468 0.394 0.399 0.681 0.681
Elliptical window 10% Frequency 4 6 14 16 31 49 60 71 104 80 39 49 41 29 26   619
Sensitivity 0.001 0.154 0.247 0.313 0.347 0.424 0.512 0.574 0.673 0.779 0.862 0.906 0.934 0.942 0.965 0.668 0.414
PPV 1.000 0.833 0.929 0.972 0.966 0.899 0.879 0.816 0.751 0.659 0.591 0.521 0.477 0.421 0.383 0.716 0.714
30% Frequency 9 5 5 9 14 34 62 72 79 50 63 60 42 24 33   561
Sensitivity 0.002 0.231 0.231 0.325 0.352 0.459 0.529 0.585 0.631 0.800 0.865 0.919 0.951 0.952 0.974 0.704 0.396
PPV 0.944 1.000 0.933 1.000 0.954 0.951 0.932 0.835 0.716 0.666 0.594 0.538 0.498 0.431 0.392 0.705 0.703
50% Frequency 30 12 10 8 22 26 65 74 93 89 69 50 23 18 24   613
Sensitivity 0.009 0.224 0.223 0.317 0.332 0.396 0.501 0.577 0.663 0.792 0.845 0.906 0.953 0.932 0.968 0.650 0.402
PPV 1.000 1.000 0.933 0.888 0.899 0.883 0.904 0.813 0.758 0.667 0.578 0.541 0.490 0.426 0.395 0.726 0.727
70% Frequency 12 6 5 15 84 210 29 100 247 32 34 17 8 29 18   846
Sensitivity 0.007 0.205 0.277 0.303 0.362 0.458 0.480 0.600 0.685 0.762 0.697 0.810 0.817 0.918 0.932 0.578 0.490
PPV 1.000 1.000 1.000 0.911 0.926 0.856 0.846 0.869 0.810 0.654 0.495 0.484 0.434 0.422 0.395 0.797 0.797
  1. % of cens, percentage of censoring; PPV, positive predictive value
  2. Cells most often selected as the optimal MRCS are shown in italics