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Table 2 Evaluation of the association of animal level risk factors with prevalence of bovine tuberculin positivity

From: Bovine tuberculosis in eastern Ethiopia: prevalence, risk factors and its public health importance

Risk factor* Categories No. of animals OR (95% CI) P-value
Examined Positive (%)
Site Harar 224 25 (11.2) Ref.  
Dire Dawa 58 29 (50.0) 7.96 (4.107–15.427) 0.000
Jigjiga 33 10 (30.3) 3.46 (1.477–8.104) 0.004
Age 1–5 years 85 17 (20.0) Ref.  
6–9 years 172 42 (24.4) 1.29 (0.685–2.439) 0.429
> 9 years 58 5 (8.6) 0.37 (0.130–1.089) 0.072
BCS Poor 67 15 (22.4) Ref.  
Medium 147 29 (19.7) 0.85 (0.421–1.721) 0.655
Good 101 20 (19.8) 0.85 (0.402–1.820) 0.686
Lactationa Non-lactating 115 11 (9.5) Ref.  
Lactating 200 53 (26.5) 0.29 (0.146–0.588) 0.001
Pregnancya Non pregnant 276 51 (18.5) Ref.  
Pregnant 39 13 (33.3) 2.22 (1.062–4.587) 0.034
Breedb Local 63 11 (17.5) Ref.  
Cross breed 15 1 (6.7) 0.30 (0.032–2.794) 0.289
Exotic 237 52 (21.9) 0.71 (0.195–2.596) 0.607
Herd sizec 1–5 46 5 (10.9) Ref.  
6–10 48 4(8.3) 0.74 (0.187–2.968) 0.677
> 10 221 55(24.9) 2.71 (1.022–7.218) 0.045
Farming systemb,c Extensive 51 7 (13.7) Ref.  
Intensive 229 50 (21.8) 3.69 (0.820–16.625) 0.089
Semi intensive 35 7 (20.0) 1.84 (0.418–8.120) 0.419
Management condition Good 83 1 (1.2) Ref.  
Poor 63 14 (22.2) 3.66 (1.31–1.83) 0.000
Medium 169 49 (29.0) 1.51 (0.51–1.51)  
  1. *Variables with similar superscripts are collinear