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Table 5 Sensitivity to detect clustering with simulated clusters at three distances from the hospital.

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

  

Percent of simulated outbreaks that exceeded a threshold

Alarm strategy

km from hospital

All seasons

Winter

Spring

Summer

Fall

M > 95th percentile

5

34.74

12.76

37.29

63.40

24.89

 

15

56.78

33.43

61.73

79.24

51.98

 

50

62.17

39.82

67.89

82.91

57.36

M > 95th percentile, by season

5

33.20

27.68

30.19

43.76

31.11

 

15

57.65

55.64

56.76

65.35

52.84

 

50

63.38

54.35

69.55

61.90

67.31

MN > 95th percentile

5

49.33

41.82

50.58

60.26

44.42

 

15

69.81

62.78

71.01

76.89

68.35

 

50

73.41

67.51

74.40

80.13

71.40

N and MN rules

5

42.44

56.21

34.10

40.92

39.08

 

15

62.87

72.02

57.47

62.91

59.43

 

50

67.92

76.03

63.90

67.25

64.80

  1. Patient population density was greatest at 5 km from the hospital and declined as distance away from the hospital increased.