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Table 5 Outputs of a final multivariable model fitted to the longitudinal data illustrating adjusted hazard rate ratios of Brucella spp. exposure in recruited animals

From: Incidence of Brucella infection in various livestock species raised under the pastoral production system in Isiolo County, Kenya

Variable Levels Hazard Rate Ratio P - value
   Estimate 95% Confidence interval  
Sex Male 0.55 0.06–4.55 0.58
  Female 1.00  
Species Cattle 4.38 1.00–19.11 0.05
  Camels 5.66 1.62–19.78 0.01
  Sheep 0.78 0.09–6.54 0.82
  Goats 1.00  
Age Young 2.41 0.35–16.80 0.37
  Adult 1.00  
  1. Number of observations 79, number of events 12
  2. The estimated frailty variance for the random effect term (household ID) using maximum likelihood was 0.54 (SE = 0.08)