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Table 1 Assessment for spatial clustering of anthrax events using the Poisson mixed effects regression model with agro-ecological zone as fixed effect

From: Spatial clustering of livestock Anthrax events associated with agro-ecological zones in Kenya, 1957–2017

Variable Variable category Incidence rate ratio Coefficient 95% confidence interval P value
Agro-ecological zone High and Medium potential Reference   
Agro-alpine 1.23 [0.82, 1.84] 0.32
Semi-arid 0.90 [0.52, 1.57] 0.71
Arid 0.48 [0.23, 1.00] 0.05
Very Arid 0.39 [0.23, 0.67] < 0.001
Random effects Subcounty identification: 0.72  
  1. Llikelihood ratio test versus Poisson regression chibar2(01) = 536.87; Prob> = chibar2 = 0.000