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Table 3 Simulation results for cluster model C (two circular clusters, 10% each 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 18 12 11 17 103 48 46 65 19 12 20 39 53 39 26   528
Sensitivity 0.005 0.174 0.288 0.284 0.414 0.464 0.478 0.544 0.513 0.597 0.771 0.857 0.943 0.953 0.971 0.588 0.313
PPV 0.982 0.875 0.947 0.931 0.971 0.819 0.724 0.711 0.547 0.484 0.495 0.468 0.451 0.393 0.361 0.694 0.690
30% Frequency 30 7 15 15 114 46 55 82 28 34 17 26 18 23 17   527
Sensitivity 0.007 0.167 0.244 0.256 0.382 0.409 0.444 0.498 0.506 0.674 0.750 0.840 0.917 0.971 0.980 0.500 0.267
PPV 0.967 1.000 0.778 0.967 0.986 0.799 0.736 0.724 0.525 0.525 0.485 0.455 0.439 0.393 0.360 0.734 0.734
50% Frequency 47 4 17 8 82 24 44 58 26 49 11 23 27 28 17   465
Sensitivity 0.011 0.167 0.245 0.250 0.383 0.438 0.451 0.471 0.458 0.692 0.735 0.844 0.874 0.911 0.927 0.505 0.242
PPV 1.000 1.000 0.878 0.833 0.937 0.824 0.733 0.687 0.487 0.535 0.485 0.453 0.431 0.381 0.343 0.697 0.692
70% Frequency 77 2 15 3 281 46 5 14 7 10 23 27 3 53 25   591
Sensitivity 0.016 0.167 0.250 0.250 0.356 0.379 0.383 0.399 0.500 0.658 0.757 0.904 0.778 0.849 0.827 0.424 0.258
PPV 0.987 1.000 0.750 0.600 0.764 0.697 0.582 0.506 0.482 0.492 0.486 0.477 0.378 0.357 0.321 0.691 0.691
Elliptical window 10% Frequency 4 14 14 17 73 43 54 39 48 55 55 39 39 24 33   551
Sensitivity 0.001 0.196 0.268 0.304 0.389 0.446 0.435 0.532 0.547 0.811 0.861 0.949 0.949 0.951 0.975 0.636 0.350
PPV 1.000 0.905 0.869 0.985 0.908 0.826 0.709 0.692 0.574 0.623 0.573 0.530 0.460 0.388 0.354 0.664 0.662
30% Frequency 14 23 6 22 84 86 52 64 43 50 34 20 22 25 15   560
Sensitivity 0.004 0.217 0.236 0.299 0.367 0.420 0.431 0.475 0.574 0.777 0.851 0.900 0.905 0.960 0.983 0.539 0.304
PPV 1.000 1.000 0.944 0.967 0.936 0.871 0.751 0.666 0.581 0.609 0.548 0.491 0.439 0.400 0.359 0.729 0.729
50% Frequency 27 26 9 20 54 59 39 78 46 50 23 22 20 25 33   531
Sensitivity 0.007 0.244 0.222 0.300 0.360 0.412 0.436 0.473 0.533 0.717 0.710 0.845 0.900 0.937 0.927 0.526 0.285
PPV 1.000 1.000 0.861 0.905 0.887 0.802 0.740 0.647 0.542 0.570 0.440 0.465 0.437 0.389 0.339 0.673 0.670
70% Frequency 34 23 2 54 154 122 17 15 35 14 32 37 40 20 49   648
Sensitivity 0.010 0.221 0.208 0.323 0.329 0.336 0.343 0.383 0.521 0.637 0.779 0.887 0.892 0.883 0.959 0.481 0.316
PPV 1.000 1.000 0.708 0.973 0.762 0.594 0.529 0.498 0.536 0.478 0.492 0.484 0.432 0.372 0.357 0.646 0.645
  1. % of cens, percentage of censoring; PPV, positive predictive value
  2. Cells most often selected as the optimal MRCS are shown in italics