Factor | Condition | BRSV status | RR | CI (95%) | p value | ||
---|---|---|---|---|---|---|---|
High | Low | Limit inferior | Limit Superior | ||||
Herd size (> 75 animals) | Yes | 3 | 2 | 1.40 | 0.59 | 3.34 | 0.422 |
No | 9 | 12 | |||||
Herd density (> 5 animals/ha) | Yes | 5 | 4 | 1.34 | 0.60 | 3.05 | 0.387 |
No | 7 | 10 | |||||
Breed (Holstein) | Yes | 7 | 7 | 1.20 | 0.51 | 2.81 | 0.488 |
No | 5 | 7 | |||||
Type of reproduction (natural mating) | Yes | 2 | 8 | 0.32 | 0.09 | 1.17 | 0.420 |
No | 10 | 6 | |||||
Purchasing of animals (last six months) | Yes | 6 | 10 | 0.63 | 0.28 | 1.41 | 0.237 |
No | 6 | 4 | |||||
Cleaning of facilities (rarely) | Yes | 7 | 9 | 0.88 | 0.38 | 2.01 | 0.536 |
No | 5 | 5 | |||||
Historical of respiratory disease (last six months) | Yes | 7 | 6 | 1.40 | 0.60 | 3.28 | 0.347 |
No | 5 | 8 | |||||
Quarantine (absence) | Yes | 10 | 11 | 1.19 | 0.37 | 3.81 | 0.578 |
No | 2 | 3 | |||||
Abortions | Yes | 5 | 6 | 0.97 | 0.42 | 2.26 | 0.632 |
No | 7 | 8 | |||||
Type of calves housing (collective) | Yes | 9 | 14 | 0.39 | 0.24 | 0.65 | 0.085 |
No | 3 | 0 | |||||
Type of calves feeding (natural suckling) | Yes | 3 | 10 | 0.33 | 0.12 | 0.96 | 0.023 |
No | 9 | 4 | |||||
Presence of others domestic animals | Yes | 11 | 13 | 0.92 | 0.21 | 3.92 | 0.720 |
No | 1 | 1 | |||||
Presence of wild ruminant animals | Yes | 5 | 9 | 0.61 | 0.26 | 1.43 | 0.224 |
No | 7 | 5 |