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Table 4 Linear mixed regression model of the variables associated with a change in BRSV percentage positivity (PP) from the beginning of gradual weaning (day -14) to 2 weeks post weaning (day +14)

From: Risk factors associated with exposure to bovine respiratory disease pathogens during the peri-weaning period in dairy bull calves

Variable Categories Coefficient Standard error P value
Intercept   31.577 5.292 <0.001
Maximum rectal temperature (°C) in the pre-weaning period (d-56 to d-14) 38.9–39.4 Baseline
39.5–39.6 7.956 4.955 0.108
39.7–40.0 -7.442 4.513 0.099
40.1–41.3 -3.732 4.474 0.404
Random effects Variance estimate Standard error  
Pen 78.259 73.088 <0.001
Residual 194.018 34.026