Table 3 The results of a linear mixed model to estimate the effect of eprinomectin treatment around calving on daily milk production in 11 herds (based on 477 cows)
Variable | Estimate | Lower limit | Upper limit | t Value | P |
|---|---|---|---|---|---|
95% CI | 95% CI | ||||
Intercept | 95.80 | 88.66 | 102.93 | 26.36 | <0.001 |
Eprinomectin (vs. control) | 0.97 | 0.16 | 1.77 | 2.36 | 0.019 |
Lactation number (baseline is third lactation or higher) | Â | Â | Â | Â | <0.001 |
First | -7.15 | -8.17 | -6.11 | -13.66 | <0.001 |
Second | -3.05 | -4.03 | -2.07 | -6.13 | <0.001 |
Ln (SCC/1000) | -1.21 | -1.36 | -1.06 | -16.12 | <0.001 |
DIM | -0.07 | -0.07 | -0.06 | -43.02 | <0.001 |
Wilmink | -58.02 | -66.05 | -49.99 | -14.16 | <0.001 |
Year quarter (baseline is 4th year quarter) | Â | Â | Â | Â | 0.0064 |
First | -1.23 | -2.31 | -0.15 | -2.23 | 0.026 |
Second | -1.48 | -2.68 | -0.27 | -2.41 | 0.016 |
Third | -1.84 | -2.94 | -0.74 | -3.29 | 0.001 |
Random Effects | Variance | S.E. | Proportion of total variance (%) | Z value | P |
Herd | 12.95 | 6.00 | 27 | 2.16 | 0.015 |
Animal | 16.50 | 1.28 | 35 | 12.90 | <0.001 |
Residual | 17.92 | 0.44 | 38 | 40.48 | <0.001 |