Table 6.
Effect of the Feet and leg traits on the risk of lameness in Chinese holstein cows
| Trait | Level (points) | B | SE | Wald χ2 | df | OR value | 95% confidence interval | P value | |
|---|---|---|---|---|---|---|---|---|---|
| Lower limit | Upper limit | ||||||||
| FA | 5 vs. 4 | -1.87 | 1.61 | 1.36 | 1 | 0.15 | 0.01 | 3.58 | 0.244 |
| 6 vs. 4 | -0.25 | 1.41 | 0.03 | 1 | 0.78 | 0.05 | 12.28 | 0.858 | |
| 7 vs. 4 | -0.61 | 1.53 | 0.16 | 1 | 0.54 | 0.03 | 10.99 | 0.691 | |
| HD | 4 vs. 3 | -1.23 | 2.09 | 0.35 | 1 | 0.29 | 0.01 | 17.55 | 0.557 |
| 5 vs. 3 | -1.54 | 1.94 | 0.63 | 1 | 0.22 | 0.01 | 9.59 | 0.428 | |
| 6 vs. 3 | -1.60 | 1.79 | 0.79 | 1 | 0.20 | 0.01 | 6.80 | 0.373 | |
| BQ | 7 vs. 6 | 1.12 | 0.69 | 2.65 | 1 | 3.08 | 0.80 | 11.89 | 0.103 |
| 8 vs. 6 | 1.54 | 1.70 | 0.82 | 1 | 4.67 | 0.17 | 129.94 | 0.364 | |
| SRL | 2 vs. 1 | -2.36 | 0.98 | 5.78 | 1 | 0.10 | 0.01 | 0.65 | 0.016 |
| 3 vs. 1 | -2.04 | 0.99 | 4.31 | 1 | 0.13 | 0.02 | 0.89 | 0.038 | |
| 4 vs. 1 | -3.14 | 1.37 | 5.24 | 1 | 0.04 | 0.00 | 0.64 | 0.022 | |
| 5 vs. 1 | -2.51 | 1.73 | 2.11 | 1 | 0.08 | 0.00 | 2.40 | 0.146 | |
| RLRV | 6 vs. 5 | -1.34 | 1.31 | 1.04 | 1 | 0.26 | 0.02 | 3.43 | 0.308 |
| 7 vs. 5 | -1.37 | 1.21 | 1.28 | 1 | 0.25 | 0.02 | 2.74 | 0.259 | |
| 8 vs. 5 | -2.16 | 1.30 | 2.76 | 1 | 0.12 | 0.01 | 1.47 | 0.097 | |
B: unstandardized regression weight; SE: standard error for B; Wald χ2: the test statistic for the individual predictor variable; df: degrees of freedom. The reference level of each individual conformational feature is determined by the minimum score within the group