Skip to main content

Table 4 Estimates with corresponding confidence intervals (95% CI) and P-values for the milk production parameters milk yield (kg/cow/day), protein content (%) and fat content (%) from the multivariable linear mixed model

From: The effect of patent Dictyocaulus viviparus (re)infections on individual milk yield and milk quality in pastured dairy cows and correlation with clinical signs

Production trait   Milk yield Protein content Fat content
  Estimate (95% CI) P-value Estimate (95% CI) P-value Estimate (95% CI) P-value
Intercept   16.69 (13.46; 19.93) < 0.0001 4.06 (3.87; 4.24) < 0.0001 4.87 (4.49; 5.25) < 0.0001
FLC FLC negative 1.62 (0.07; 3.18) 0.0406 -0.05 (-0.15; 0.05) 0.3666 -0.05 (-0.25; 0.15) 0.6092
  FLC positive Baseline   Baseline   Baseline  
Parity 1 -3.49 (-4.38; -2.59) < 0.0001 -0.00 (-0.06; 0.05) 0.9508 -0.02 (-0.13; 0.10) 0.7946
  2 -1.64 (-2.55; -0.72) 0.0005 0.09 (0.04; 0.15) 0.0017 0.03 (-0.09; 0.14) 0.6284
  3 0.80 (-0.15; 1.76) 0.1000 0.07 (0.01; 0.13) 0.0290 -0.06 (-0.18; 0.06) 0.2918
  4 0.71 (-0.33; 1.75) 0.1790 0.09 (0.02; 0.15) 0.0075 0.06 (-0.07; 0.19) 0.3784
  > 4 Baseline   Baseline   Baseline  
Lactation stage DIM ≤ 14 10.20 (8.68; 11.71) < 0.0001 -0.28 (-0.37; -0.18) < 0.0001 -0.30 (-0.49; -0.10) 0.0026
  DIM 14-77 11.11 (10.39; 11.84) < 0.0001 -0.62 (-0.67; -0.58) < 0.0001 -0.63 (-0.72; -0.54) < 0.0001
  DIM 78-140 8.35 (7.61; 9.08) < 0.0001 -0.51 (-0.56; -0.47) < 0.0001 -0.58 (-0.68; -0.49) < 0.0001
  DIM 141-231 4.65 (4.03; 5.27) < 0.0001 -0.25 (-0.29; -0.21) < 0.0001 -0.31 (-0.39; -0.23) < 0.0001
  DIM ≥ 232 Baseline   Baseline   Baseline  
Genetic line DSN -1.02 (-2.73; 0.69) 0.2406 -0.05 (-0.16; 0.05) 0.3008 -0.28 (-0.49; -0.08) 0.0067
  Crosses 0.33 (-1.93; 2.58) 0.7744 0.02 (-0.12; 0.16) 0.7717 -0.10 (-0.38; 0.19) 0.5039
  HF-GHm 1.45 (0.21; 2.68) 0.0223 -0.20 (-0.27; -0.12) < 0.0001 -0.40 (-0.56; -0.25) < 0.0001
  HF-GHp 0.94 (-0.64; 2.52) 0.2434 -0.15 (-0.24; -0.05) 0.0044 -0.33 (-0.52; -0.13) 0.0012
  HF-NZ Baseline   Baseline   Baseline  
Test-day season < September 1.39 (0.79; 1.98)   -0.23 (-0.27; -0.19) < 0.0001 -0.26 (-0.34; -0.19) < 0.0001
  ≥ September Baseline < 0.0001 Baseline   Baseline  
Time span ≤ 8 -1.61 (-3.55; 0.31) 0.0998 -0.12 (-0.23; -0.01) 0.0581 -0.05 (-0.28; 0.18) 0.6782
  > 8 and ≤ 16 -3.71 (-5.54; -1.88) < 0.0001 -0.09 (-0.20; 0.01) 0.1228 0.11 (-0.11; 0.33) 0.3169
  > 16 and ≤ 24 -2.72 (-4.47; -0.96) 0.0024 -0.04 (-0.14; 0.07) 0.5639 0.18 (-0.03; 0.39) 0.1014
  > 24 and ≤ 32 -2.49 (-4.67; -0.51) 0.0136 -0.05 (-0.17; 0.07) 0.5143 0.19 (-0.05; 0.43) 0.1180
  > 32 Baseline   Baseline   Baseline  
Random effects   Estimate   Estimate   Estimate  
Farm   7.97   0.01   0.06  
Cow   9.94   0.03   0.15  
Residual   13.41   0.06   0.22  
  1. Abbreviations: CI confidence interval, FLC binary defined faecal larvae count (FLC = 0 classified as ‘FLC negative’; FLC ≥ 1 classified as ‘FLC positive’) as a parameter for D. viviparus infection status
Back to article page

Parasites & Vectors

ISSN: 1756-3305

Contact us