Table 1 

Final multivariable hurdle models, with and without the spatial correlation variable 

Variable (*) 
Hurdle model with spatial correlation variable truncated Poisson 
zero model 
Hurdle model truncated Poisson 
zero model 


Bulls per population 
5.0 (2.29.1) 
5.0 (1.39.0) 
5.1 (2.29.3) 
4.8 (1.18.7) 
Proportion of adult population with middle education or higher 
5.6 (2.09.1) 
5.0 (2.38.1) 
5.8 (1.910.7) 
4.6 (1.57.7) 
Proportion of low income households with children 
7.1 (1.912.4) 
(ns, excluded) 
7.2 (1.912.3) 
(ns, excluded) 
Number of farms under cultivation per square km 
2.0 (0.73.2) 
(ns, excluded) 
2.1 (0.53.3) 
(ns, excluded) 
Fresh water per total surface area 
1.9 (0.43.3) 
(ns, excluded) 
1.9 (0.43.4) 
(ns, excluded) 


(*) Parameter estimates (with 95% equal tail credible intervals) 

Jalava et al. BMC Infectious Diseases 2011 11:275 doi:10.1186/1471233411275 