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Table 7 Summary of space-time clusters of high kidney condemnation rates

From: Suitability and limitations of portion-specific abattoir data as part of an early warning system for emerging diseases of swine in Ontario

Cluster

# of abattoirs

Radius (km)

Timeframe

# of kidneys condemned/pigs

CR/1000 pigs

O/E

1

51

163.92

2007/4/17-2007/12/12

626/18 958

33.02

4.49

2

1

0

2001/3/12-2001/3/16

80/714

112.04

115.85

3

21

116.45

2004/8/10-2007/2/13

2393/39 747

60.21

39.74

4

11

39.74

2001/1/2-2004/6/29

5725/254 879

22.46

1.30

5

3

8.85

2002/10/16-2003/6/24

395/1 581

249.84

3.65

  1. Summary of statistically significant (p < 0.05) space-time clusters* of high partial carcass condemnation rates in Ontario Provincial abattoirs for kidneys (2001-2007).**
  2. * SaTScan settings: maximum spatial scanning window specified as 50% of cases; maximum temporal scanning window specified as 50% of the study period.
  3. ** Descriptive statistics indicating number of abattoirs in each cluster, cluster radius, cluster timeframe, total kidneys condemned per number of market hogs processed (pigs), corresponding condemnation rate per 1000 pigs and observed/expected (O/E) ratio.