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Table 5 Association between animal characteristics and seropositivity of Brucella assessed by logistic regression and Chi-square

From: Seroprevalence of bovine brucellosis and associated risk factors in and around Alage district, Ethiopia

Factors

Level

n

Test +ve

%

OR

95 % CI

Z-test

P value

Age

0.5 ≤ 3a

233

1

0.4

    

3 ≤ 6

308

4

1.3

3.2262

28.32–30.53

1.0386

0.299

≥7

263

14

5.3

11.376

90.33–85.47

2.3308

0.0198

Sex

Fa

529

18

3.4

    

M

275

1

0.4

0.104

0.014–0.78

−2.3742

0.007

Breed

Arsia

494

16

3.2

    

HF

149

1

0.7

0.1724

0.302–3.75

−1.3915

0.1641

Boran

161

2

1.2

0.4001

2.02–4.15

−0.8571

0.3914

Herd size

≤20a

232

6

2.3

    

>20

572

13

2.6

1.6378

4.30–5.28

0.3586

0.7199

  1. aOthers were computed in reference to this category
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