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Table 8 Sensitivity to detect clustering by season, number of extra visits, distance from the hospital, and radius of the simulated cluster.

From: Real time spatial cluster detection using interpoint distances among precise patient locations

  

Distance from the hospital

 

Cluster radius

5 km

15 km

50 km

WINTER

10 extra visits

250 m

11.58

18.05

16.92

 

500 m

11.05

18.05

16.92

 

1 km

10.00

18.80

18.05

 

3 km

5.00

12.78

16.92

25 extra visits

250 m

55.26

77.44

86.84

 

500 m

52.89

78.57

86.84

 

1 km

47.37

78.95

86.47

 

3 km

22.37

62.78

84.21

40 extra visits

250 m

83.95

98.50

99.25

 

500 m

82.63

98.87

99.25

 

1 km

78.16

98.87

99.25

 

3 km

41.58

91.73

99.25

SPRING

10 extra visits

250 m

16.50

33.93

23.93

 

500 m

14.00

32.86

23.93

 

1 km

12.50

32.50

25.00

 

3 km

7.25

27.14

22.86

25 extra visits

250 m

71.25

89.29

99.29

 

500 m

67.25

90.00

99.29

 

1 km

58.50

88.57

99.29

 

3 km

25.50

67.86

99.29

40 extra visits

250 m

95.50

99.64

100.00

 

500 m

94.00

99.64

100.00

 

1 km

92.25

99.64

100.00

 

3 km

52.50

91.07

100.00

SUMMER

10 extra visits

250 m

26.15

42.49

41.03

 

500 m

25.64

43.22

41.03

 

1 km

22.31

41.39

42.86

 

3 km

9.74

35.90

40.66

25 extra visits

250 m

84.10

95.24

98.53

 

500 m

83.33

95.60

98.90

 

1 km

75.13

94.87

99.27

 

3 km

38.97

77.66

99.27

40 extra visits

250 m

95.90

100.00

100.00

 

500 m

95.64

100.00

100.00

 

1 km

94.10

100.00

100.00

 

3 km

72.05

96.34

100.00

FALL

10 extra visits

250 m

7.95

29.30

19.05

 

500 m

7.44

27.84

19.41

 

1 km

6.15

28.21

19.05

 

3 km

1.54

19.41

17.58

25 extra visits

250 m

62.56

86.81

95.97

 

500 m

60.51

87.18

95.97

 

1 km

51.79

84.62

96.70

 

3 km

19.49

67.03

93.04

40 extra visits

250 m

90.51

98.63

100.00

 

500 m

89.23

100.00

100.00

 

1 km

87.18

100.00

100.00

 

3 km

48.72

90.11

100.00

  1. The numbers in the cells are the percentage of simulated outbreaks that exceeded the 95th percentile value of M × N (M statistic × number of visits).