Table 2.
Univariable logistic regression analyses of explanatory variables of small ruminant brucellosis.
| Variable | Level | No. tested | CFT positive (%) | OR | 95% CI for CFT | Fisher's exact test P value |
|---|---|---|---|---|---|---|
| District | Hirna | 238 | 0 (0) | 1.0 | — | — |
| Mieso | 1334 | 4 (0.3) | 1.36 | 0.61–3.03 | 0.449 | |
| Chiro | 498 | 1 (0.2) | 1.69 | 0.72–3.96 | 0.229 | |
| Species | Sheep | 1101 | 2 (0.18) | 1.0 | — | — |
| Goat | 969 | 3 (0.32) | 1.37 | 0.89–2.11 | 0.153 | |
| Altitude | Highland | 301 | 0 (0) | 1.0 | — | — |
| Midland | 408 | 1 (0.25) | 1.17 | 0.43–3.14 | 0.759 | |
| Lowland | 1361 | 4 (0.3) | 4.15 | 2.23–7.72 | 0.0001 | |
| Sex | Male | 442 | 1 (0.23) | 1.0 | — | — |
| Female | 1628 | 4 (0.25) | 1.04 | 0.61–1.79 | 0.884 | |
| Age | Young (<1 year) | 469 | 0 (0) | 1.0 | — | — |
| Adult (>1 year) | 1601 | 5 (0.31) | 1.53 | 0.86–2.74 | 0.152 | |
| Flock size | Small | 1097 | 2 (0.18) | 1.0 | — | — |
| Large | 973 | 3 (0.31) | 1.68 | 1.08–2.60 | 0.021 | |
| Production system | Sedentary | 404 | 0 (0) | 1.0 | — | — |
| Pastoral | 1331 | 4 (0.3) | 2.59 | 1.37–4.90 | 0.004 | |
| Agropastoral | 335 | 1 (0.29) | 4.01 | 2.35–6.84 | 0.0001 | |
| Management | Extensive | 1785 | 2 (0.1) | 1.0 | — | — |
| Semi-intensive | 285 | 3 (1) | 1.02 | 0.54–1.90 | 0.959 | |
| Mixed flock | No | 1002 | 1 (0.1) | 1.0 | — | — |
| Yes | 1068 | 4 (0.37) | 2.11 | 1.33–3.36 | 0.002 |