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Table 3 Final model describing explanatory variables and random effects of log transformed BioX ELISA optical density measurements (ODC%). The marginal R2 was 39% and conditional R2 was 61%

From: Mycoplasma bovis antibody dynamics in naturally exposed dairy calves according to two diagnostic tests

Variables Variance 95% confidence interval  
Random effects
 Animal 0.28 0.13–0.38  
 Residuals 0.47 0.37–0.54  
   Estimate SE p-value
Fixed effects
 Intercept   2.55 0.26 <  0.001
 Age days (linear)   14.68 3.93 <  0.001
 Age days (quadratic)   −8.16 2.27 <  0.001
 Herd 1   0  
 Herd 2   0.30 0.30 0.311
 Herd 3   −0.10 0.30 0.753
 Herd 4   0.37 0.31 0.229
 Age days (linear)*Herd 1   0  
 Age days (linear)*Herd 2   −5.93 4.27 0.165
 Age days (linear)*Herd 3   7.11 4.59 0.123
 Age days (linear)*Herd 4   −8.15 5.06 0.108
 Age days (quadratic)*Herd 1   0  
 Age days (quadratic)*Herd 2   4.80 2.65 0.072
 Age days (quadratic)*Herd 3   13.42 3.19 <  0.001
 Age days (quadratic)*Herd 4   13.95 3.31 <  0.001