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Table 1 Characteristics of the three areas in Sweden with significantly higher or lower BCV and BRSV prevalences obtained by a spatial scan statistic (Kulldorff, 1997).

From: Spatial patterns of Bovine Corona Virus and Bovine Respiratory Syncytial Virus in the Swedish beef cattle population

Clusters BCV BRSV
  Area (km2) Samples (n) Prevalence (%) RR1 Area (km2) Samples (n) Prevalence (%) RR1
Skaraborg 7,585 207 72.5 1.77** 4,734 156 69.2 1.85**
Skåne 3,748 254 65.5 1.51** 2,852 223 66.8 1.82**
Kronoberg-Blekinge 10,145 247 23.8 0.53** 15,397 401 20.7 0.51*
Värmland-Dalarna -   - - 31,435 89 7.9 0.20**
  1. 1 Relative Risk
  2. * < 0.05
  3. ** < 0.001