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Table 6 Summary of spatial clusters* of high condemnation rates by entire study period (2001 – 2007)

From: Exploring relationships between whole carcass condemnation abattoir data, non-disease factors and disease outbreaks in swine herds in Ontario (2001–2007)

Cluster Total number of abattoirs Radius (km) Total number of pigs condemned Total number of pigs processed CR/1000 pigs RR P-value
1 21 66.81 3 446 103 116 33.42 6.85 0.0001
2 1 0 1 895 34 109 55.56 10.24 0.0001
3 5 20.53 320 12 198 26.23 4.32 0.0001
4 3 13.71 130 3 728 34.87 5.69 0.0001
5 2 8.21 55 2 790 19.71 3.20 0.0001
6 1 0 47 3 128 15.03 2.44 0.0001
7 10 31.20 270 31 210 8.65 1.41 0.001
  1. * Detected with a Poisson model using the spatial scan statistic run over the entire study period (2001 – 2007) with a maximum scanning window of 50% of abattoirs and significance level alpha ≤ 0.05.
  2. Descriptive statistics indicating total market hogs (pigs) condemned, processed, corresponding condemnation rates (CR) per 1000 market hogs processed and relative risks (RR) within these clusters.