Table 1 Summarizing results of the multivariable analysis of BNP using a sire-dam model ( n  = 411)
| Â | Heritability estimate (SE) | Â | Â | |
|---|---|---|---|---|
Sire | 0.00 (0.00) | Â | Â | Â |
Dam | 0.19 (0.08) | Â | Â | Â |
Variable | Category ( n ) | β (SE) | Odds ratio | Wald test P -value |
Lactation number | 1 (67) | Referent | 1 | 0.021 |
| Â | 2 (106) | 0.49 (0.57) | 1.63 | Â |
| Â | 3 (96) | 1.10 (0.60) | 3.00 | Â |
| Â | 4 (70) | 0.77 (0.63) | 2.17 | Â |
|  | 5 ≥ (72) | −0.14 (0.68) | 0.87 |  |
Number of Pregsure© BVD vaccinations | ≤2 (118) | Referent | 1 | 0.014 |
| Â | 3 (134) | 0.35 (0.42) | 1.42 | Â |
|  | 4 ≥ (159) | 1.17 (0.45) | 3.21 |  |
Time since last Pregsure© BVD vaccination | Per month | 0.03 (0.02) | 1.03 | 0.214 |