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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