Date of cluster | No. of abattoirs in cluster | Latitude (°N) | Longitude (°W) | Radius (Km) | No. of cases | Relative risk1 | P-value |
---|---|---|---|---|---|---|---|
a) Unadjusted Poisson space-time scan test | |||||||
Jan 2001 - Jun 2004 | 5 | 43.94 | 79.69 | 26.60 | 14896 | 4.98 | < 0.001 |
Jun 2004 - Nov 2007 | 63 | 49.75 | 92.96 | 1149.60 | 54 | 0.01 | < 0.001 |
b) Animal-adjusted Poisson space-time scan test | |||||||
Jan 2001 - Jun 2004 | 5 | 43.96 | 79.69 | 26.60 | 14896 | 3.12 | < 0.001 |
Mar 2004 - Aug 2007 | 21 | 43.01 | 79.97 | 49.09 | 61 | 0.01 | < 0.001 |
Oct 2001 - Mar 2005 | 1 | 42.98 | 80.60 | 0 | 4466 | 5.14 | < 0.001 |
c) Model-adjusted space-time scan test | |||||||
Mar 2004 - Aug 2007 | 16 | 43.01 | 79.97 | 36.88 | 60 | 0.07 | < 0.001 |
Jan 2001 - Mar 2003 | 1 | 43.91 | 79.82 | 0 | 1558 | 0.44 | < 0.001 |
Jan 2001- Mar 2002 | 4 | 43.30 | 79.90 | 19.98 | 477 | 6.06 | < 0.001 |
Apr 2005 - Nov 2007 | 4 | 43.96 | 79.19 | 20.93 | 273 | 0.26 | < 0.001 |
d) Space-time permutation scan test | |||||||
Jan 2001 - Feb 2003 | 11 | 44.14 | 79.94 | 28.20 | 1520 | 0.31 | < 0.001 |
Jan 2001 - Feb 2003 | 32 | 42.95 | 79.10 | 121.36 | 10514 | 1.55 | < 0.001 |
Feb 2005 - Dec 2007 | 10 | 43.96 | 79.19 | 38.19 | 363 | 0.20 | < 0.001 |
e) Space-time scan test of residuals | |||||||
Jan 2001 - Mar 2003 | 1 | 43.91 | 79.82 | 0 | 110 | --- | < 0.001 |
Jan 2001 – Feb 2003 | 8 | 43.17 | 79.73 | 26.91 | 370 | --- | < 0.001 |
Jul 2003 - Jun 2004 | 6 | 43.65 | 79.86 | 29.33 | 109 | --- | < 0.001 |
Jan 2001 - Mar 2003 | 36 | 43.99 | 80.67 | 68.49 | 2280 | --- | < 0.001 |