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Table 4 Multivariable logistic regression model of risk factors for Brucella seropositivity in cattle at individual (n = 1623) and herd (n = 134) levels using village as the cluster variable

From: Cattle brucellosis in traditional livestock husbandry practice in Southern and Eastern Ethiopia, and its zoonotic implication

Variable level Odds Ratio 95% CI P-value
Individual animal level
Age 1 - 2 years 1.0 - -
  3-4 years 3.1 1.0, 9.6 0.045
  > 4 years 5.2 2.1, 12.9 0.000
Herd Size < 15 animals 1.0 - -
  15 - 29 animals 8.1 1.9, 34.2 0.005
  ≥ 30 animals 8.0 1.8, 35.0 0.006
Herd level
Species composition Cattle-small rum 1.0 - -
  Cattle-small rum-camel 2.7 1.1, 6.8 0.039
Herd Size < 15 animals 1.0 - -
  15 - 29 animals 11.3 2.4, 51.9 0.002
  ≥ 30 animals 19.6 3.8, 100.9 0.000