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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)

From: Non-invasive indicators associated with the milk yield response after anthelmintic treatment at calving in dairy 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)      <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)      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