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Table 2 Assessment of temporal trends of anthrax events using Poisson mixed-effects regression model with calendar month as fixed effect across years

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

Variable Variable category Coefficient 95% confidence interval P value
Month January Reference   
February 1.04 [0.70, 1.63] 0.43
March 1.11 [0.77, 1.65] 0.55
April 1.05 [0.72, 1.55] 0.76
May 1.09 [0.76, 1.62] 0.62
June 1.05 [0.72, 1.55] 0.76
July 1.13 [0.79, 1.67] 0.49
August 0.61 [0.39, 0.97] 0.03
September 0.88 [0.58, 1.31] 0.53
October 1.32 [0.50, 1.15] 0.19
November 1.11 [0.77, 1.65] 0.55
December 0.66 [1.65, 1.01] 0.06
Random effects County identification: Standard deviation =1.57  
  1. Likelihood ratio test versus Poisson regression chibar2(01) = 1441.2; Prob> = chibar2 = 0.0000