Variable | B | S.E | OR | 95% C.I. for OR | P value | |
---|---|---|---|---|---|---|
Lower | Upper | |||||
Age (years) | ||||||
Ā Ā 2ā4 | 0.223 | 0.363 | 1.25 | 0.613 | 2.547 | 0.540 |
Ā Ā >ā4ā8 | 0.920 | 0.288 | 2.51 | 1.428 | 4.414 | 0.001 |
Hand washing between milkings | ||||||
Ā Ā No | 1.881 | 0.286 | 6.56 | 3.745 | 11.503 | ā<ā0.0001 |
Parity | Ā | Ā | Ā | Ā | Ā | 0.029 |
Ā Ā 3ā4 | 0.426 | 0.349 | 1.53 | 0.773 | 3.034 | 0.222 |
Ā Ā >ā4 | 0.976 | 0.380 | 2.65 | 1.260 | 5.594 | 0.010 |
Lactation stage | ||||||
Ā Ā >ā60ā120 | 0.283 | 0.379 | 1.33 | 0.631 | 2.789 | 0.456 |
Ā Ā >ā120 | 0.998 | 0.389 | 2.71 | 1.266 | 5.813 | 0.010 |
Teat dipping | ||||||
Ā Ā No | 1.581 | 0.708 | 4.86 | 1.215 | 19.456 | 0.025 |
History of previous mastitis | ||||||
Ā Ā Yes | 1.073 | 0.333 | 2.93 | 1.523 | 5.620 | 0.001 |