Factor | Number of pigs | Seropositive pigs (%) | p-value | Odds (95% CI) |
---|---|---|---|---|
Pig category | ||||
 Weanera | 455 | 60(13.2) | - | - |
 Gilt | 25 | 2(8) | 0.457 | 0.572 (0.132–2.490) |
 Castrate | 178 | 28(15.7) | 0.406 | 1.229 (0.756–1.999) |
 Boar | 177 | 17(9.6) | 0.218 | 0.699 (0.396–1.236) |
 Sow | 350 | 37(10.6) | 0.259 | 0.778 (0.503–1.203) |
At least grazed on pasture | ||||
 Yes | 786 | 101(12.8) | 0.611 | 0.899 (0.597–1.355) |
 Noa | 299 | 35(11.7) | - | - |
Husbandry systems | ||||
 Intensivea | 501 | 59(11.8) | - | - |
 Free range | 13 | 1(7.7) | 0.354 | 0.709 (0.342–1.469) |
 Tethering | 577 | 75(13) | 0.544 | 0.893 (0.621–1.286) |
Breed type | ||||
 Locala | 195 | 26(13.3) | - | - |
 Cross | 733 | 104(14.2) | 0.005 | 2.659 (1.349–5.243) |
 Exotic | 256 | 14(5.5) | 0.000 | 2.858 (1.604–5.091) |
Deworm pigs | ||||
 Yesa | 797 | 102(12.8) | - | - |
 No | 388 | 42(10.9) | 0.337 | 0.829 (0.566–1.215) |
Source of pig | ||||
 Born on farma | 326 | 42(13.2) | - | - |
 Trader | 758 | 89(11.7) | 0.746 | 0.810 (0.227–2.898) |
 NGO/NAADS | 15 | 2(12.5) | 0.782 | 0.821 (0.119–5.675) |
 Gift | 62 | 7(11.3) | 0.591 | 0.710 (0.119–5.670) |
 Boar pay | 19 | 3(15.8) | 0.604 | 0.679 (0.157–2.930) |