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Table 1 Mimicking real-time analysis of emergency department visits due to influenza for individuals age 13 and over using cylindrical and irregular shaped space-time permutation scan statistics ( mlink-space and mlink space-time )

From: Maximum linkage space-time permutation scan statistics for disease outbreak detection

Date

Method

Number of days in the signal

Number of ZIPs in the signal

Observed cases

Expected cases

Relative risk

pvalue

Recurrence interval

24-Jan-05

Mlink space-time

2

2

2

0.07

27.1

0.0630

16

Mlink space

2

29

3

0.25

12.1

0.1526

7

Cylindrical

4

16

3

0.12

24.2

0.0049

204

25-Jan-05

Mlink space-time

3

3

2

0.07

27.1

0.0320

31

Mlink space

3

29

3

0.25

12.1

0.0930

11

Cylindrical

5

16

3

0.12

24.2

0.0049

204

26-Jan-05

Mlink space-time

4

6

2

0.07

26.9

0.0746

13

Mlink space

4

16

3

0.23

13.0

0.0739

14

Cylindrical

6

16

4

0.30

13.4

0.0051

196

28-Jan-05

Mlink space-time

4

5

2

0.12

16.1

0.3049

3

Mlink space

6

5

3

0.17

17.2

0.0260

38

Cylindrical

7

34

5

0.45

11.0

0.0016

625

29-Jan-05

Mlink space-time

5

11

2

0.17

11.9

0.5102

2

Mlink space

7

8

3

0.20

14.8

0.0726

14

Cylindrical

7

34

5

0.54

9.3

0.0073

137

15-May-05

Mlink space-time

3

4

2

0.04

45.5

0.0040

250

Mlink space

6

30

3

0.43

7.0

0.3623

3

Cylindrical

7

6

2

0.06

31.4

0.0416

24

17-May-05

Mlink space-time

3

3

1

0.02

48.0

0.4132

2

Mlink space

3

5

2

0.07

26.7

0.0288

35

Cylindrical

7

15

3

0.14

21.3

0.0019

526

18-May-05

Mlink space-time

4

8

2

0.07

26.7

0.0210

48

Mlink space

4

5

2

0.07

26.7

0.0551

18

Cylindrical

7

15

3

0.14

21.3

0.0019

526

19-May-05

Mlink space-time

5

9

2

0.07

26.7

0.0430

23

Mlink space

5

5

2

0.07

26.7

0.0752

13

Cylindrical

7

15

3

0.14

21.3

0.0064

156

26-Jul-05

Mlink space-time

6

9

2

0.09

21.7

0.0050

200

Mlink space

6

2

2

0.12

16.7

0.0602

17

Cylindrical

7

3

2

0.12

16.7

0.1220

8

2-Sep-05

Mlink space-time

6

5

3

0.15

20.4

0.0080

125

Mlink space

6

2

3

0.19

15.6

0.0666

15

Cylindrical

6

3

3

0.21

14.0

0.0888

11

3-Sep-05

Mlink space-time

7

5

3

0.15

20.4

0.0030

333

Mlink space

7

2

3

0.19

15.6

0.0452

22

Cylindrical

7

3

3

0.21

14.0

0.0735

14

27-Sep-05

Mlink space-time

5

8

2

0.08

25.4

0.0090

111

Mlink space

5

7

2

0.08

25.4

0.0164

61

Cylindrical

7

12

2

0.20

9.8

0.4350

2

28-Sep-05

Mlink space-time

6

13

2

0.08

25.4

0.0050

200

Mlink space

6

7

2

0.08

25.4

0.0148

67

Cylindrical

7

12

2

0.20

9.8

0.4600

2

27-Oct-05

Mlink space-time

1

2

2

0.11

17.5

0.0010

1000

Mlink space

1

2

2

0.11

17.5

0.0010

1000

Cylindrical

7

18

2

0.11

17.5

0.0581

17

28-Oct-05

Mlink space-time

2

2

2

0.11

17.5

0.0010

1000

Mlink space

2

2

2

0.11

17.5

0.0010

1000

Cylindrical

7

18

2

0.11

17.5

0.0581

17

29-Oct-05

Mlink space-time

3

2

2

0.11

17.5

0.0010

1000

Mlink space

3

2

2

0.11

17.5

0.0010

1000

Cylindrical

7

18

2

0.11

17.5

0.0581

17

30-Oct-05

Mlink space-time

4

2

3

0.14

21.8

0.0010

1000

Mlink space

4

2

3

0.14

21.8

0.0010

1000

Cylindrical

7

1

3

0.14

21.8

0.0007

1429

31-Oct-05

Mlink space-time

5

1

3

0.14

21.8

0.0020

500

Mlink space

5

2

3

0.14

21.8

0.0010

1000

Cylindrical

7

11

4

0.26

15.4

0.0007

1429

1-Nov-05

Mlink space-time

6

2

3

0.14

21.8

0.0070

143

Mlink space

6

2

3

0.14

21.8

0.0080

125

Cylindrical

7

11

4

0.29

13.9

0.0026

385

2-Nov-05

Mlink space-time

7

2

3

0.14

21.8

0.0060

167

Mlink space

7

2

3

0.14

21.8

0.0050

200

Cylindrical

7

11

4

0.29

13.9

0.0026

385

19-Nov-05

Mlink space-time

5

10

2

0.13

15.8

0.2137

5

Mlink space

7

11

4

0.32

12.6

0.0070

143

Cylindrical

7

8

3

0.21

14.4

0.0643

16

19-Dec-05

Mlink space-time

7

4

1

0.06

17.0

0.0020

500

Mlink space

7

2

1

0.06

17.0

0.2542

4

Cylindrical

7

54

2

0.18

11.3

0.1820

5

  1. For mlink space-time, the number of zip-code areas in the signal is the number of distinct ZIP codes over the temporal length of the cluster, regardless of their temporal position. Overlapping signals are grouped in the table.