Skip to main content

Table 5 Simulation results for cluster model E (one elliptical cluster, 30% 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 0 0 0 0 3 24 92 128 62 44 20 334 249 15 29   1000
Sensitivity 0.500 0.669 0.709 0.790 0.764 0.755 0.830 0.885 0.896 0.890 0.962 0.841 0.810
PPV 0.926 0.997 0.994 0.978 0.890 0.849 0.781 0.776 0.757 0.639 0.588 0.826 0.820
30% Frequency 0 0 0 1 8 18 155 209 83 91 20 257 144 5 9   1000
Sensitivity 0.600 0.556 0.536 0.694 0.736 0.692 0.665 0.760 0.882 0.896 0.890 0.933 0.778 0.725
PPV 0.923 0.983 1.000 0.992 0.973 0.918 0.853 0.765 0.775 0.768 0.675 0.577 0.872 0.863
50% Frequency 0 0 0 0 1 22 69 124 71 94 16 395 193 3 12   1000
Sensitivity 0.300 0.627 0.612 0.665 0.563 0.632 0.747 0.880 0.900 0.900 0.913 0.785 0.765
PPV 1.000 1.000 0.992 0.970 0.960 0.854 0.809 0.778 0.768 0.645 0.557 0.837 0.836
70% Frequency 3 0 0 0 4 6 8 18 46 45 15 680 32 92 51   1000
Sensitivity 0.067 0.200 0.425 0.506 0.697 0.551 0.672 0.770 0.878 0.892 0.872 0.913 0.840 0.836
PPV 1.000 1.000 1.000 0.935 0.941 0.958 0.815 0.758 0.765 0.704 0.624 0.553 0.758 0.758
Elliptical window 10% Frequency 0 0 0 0 0 2 11 52 42 72 428 273 101 18 1   1000
Sensitivity 0.625 0.696 0.867 0.755 0.765 0.894 0.951 0.959 0.992 1.000 0.899 0.896
PPV 0.962 0.966 0.930 0.931 0.993 0.980 0.891 0.795 0.709 0.606 0.928 0.933
30% Frequency 0 0 0 0 1 1 22 49 63 137 543 138 35 9 2   1000
Sensitivity 0.700 0.550 0.700 0.816 0.652 0.720 0.893 0.936 0.954 0.978 1.000 0.854 0.853
PPV 1.000 1.000 0.976 0.927 0.962 0.980 0.983 0.881 0.791 0.680 0.616 0.954 0.956
50% Frequency 0 0 0 0 0 3 1 41 68 121 512 170 60 21 3   1000
Sensitivity 0.617 0.700 0.762 0.624 0.707 0.894 0.931 0.950 0.983 1.000 0.858 0.858
PPV 1.000 0.933 0.942 0.981 0.966 0.985 0.856 0.788 0.698 0.619 0.940 0.943
70% Frequency 0 0 0 0 1 1 3 10 19 49 371 126 260 85 75   1000
Sensitivity 0.200 0.650 0.633 0.625 0.629 0.722 0.873 0.901 0.952 0.977 0.995 0.899 0.899
PPV 1.000 1.000 0.921 0.882 0.996 0.921 0.963 0.801 0.755 0.693 0.617 0.837 0.838
  1. % of cens, percentage of censoring; PPV, positive predictive value
  2. Cells most often selected as the optimal MRCS are shown in italics