Table 7

Match type improvements per original\corrected combination with count and spatial shift (km)

New match type\Original match type

County

n

d avg

d min

d max

MCD

n

d avg

d min

d max

City

n

d avg

d min

d max

ZIP

n

d avg

d min

d max

Address

range

n

d avg

d min

d max

Nearest

parcel

n

d avg

d min

d max

City

32

193

N/A

N/A

N/A

N/A

40.8

9.3

0.9

0.1

620.3

342.3

ZIP

N/A

N/A

99

N/A

N/A

N/A

8.8

0.3

200.1

Intersection

6

13

1,975

20

N/A

N/A

13.4

57.1

10.2

3.6

4.2

1.5

0.1

1.2

22.7

686.6

3,849.8

6.5

Street centroid

10

47

1,908

62

N/A

N/A

29.6

12.4

12.2

110.8

4.1

1

0

0.1

222.3

322.74

2,363.6

6,398.8

Address range

6

35

1,868

265

N/A

N/A

84.2

32.7

9.6

3.8

4.4

0.3

0

0

239.1

428.2

731.6

206.9

Nearest parcel

N/A

N/A

2

N/A

N/A

N/A

20

13.7

26.2

Exact parcel

N/A

N/A

1

N/A

N/A

N/A

3.5

3.5

3.5

Building centroid

N/A

13

415

591

1,108

104

81.9

18.8

2.3

0.1

0

0.6

0.1

0.1

0

0

666.2

664.4

56.4

8.1

0.7

d = distance (km) offset between corrected and uncorrected geocodes

Goldberg et al. International Journal of Health Geographics 2008 7:60   doi:10.1186/1476-072X-7-60