Beaudeau et al. Acta Veterinaria Scandinavica 2010, 52:33 http://www.actavetscand.com/content/52/1/33 Page 5 of 7 Figure 2 Prevalence of BRSV in Swedish beef cattle by three-digit postal code area (2007). The estimates are (a) crude or (b) adjusted by em- pirical Bayes smoothing applying a spatial weight matrix. Information was missing for the white areas. © Lantmäteriverket Gävle 2010. Permission num- ber I 2010/0055. 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). Clusters Skaraborg Skåne Kronoberg-Blekinge Värmland-Dalarna 1 Relative Risk * < 0.05 ** < 0.001 BCV 7,585 3,748 10,145 - 1.77** 1.51** 0.53** - BRSV 4,734 2,852 15,397 31,435 Area (km2) Samples (n) Prevalence (%) RR1 Area (km2) Samples (n) Prevalence (%) RR1 207 254 247 72.5 65.5 23.8 - 156 223 401 89 69.2 66.8 20.7 7.9 1.85** 1.82** 0.51* 0.20**