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Table 4 Multivariable linear regression model for calf pre-weaning average daily gain

From: Association between clinical respiratory signs, lung lesions detected by thoracic ultrasonography and growth performance in pre‐weaned dairy calves

Variable Estimate average daily gain (kg) SE P-value
Intercept 0.87 0.09 < 0.001
Clinical BRDa
 - Referent   
 + -0.04 0.03 0.20
TUS30b
 TUSS1 Referent   
 TUSS2 0.02 0.03 0.44
 TUSS3 -0.03 0.04 0.50
 TUSS4 -0.12 0.04 0.01
Breedc
 HF Referent   
 HF × AA 0.04 0.05 0.50
Housed
 FV Referent   
 NV -0.07 0.05 0.16
  1. aBovine respiratory disease.
  2. bClassification of calves considering the ultrasound evaluations performed up to day 30. For more detail regarding thoracic ultrasound score (TUSS) from 1 to 4 see details on material and method section.
  3. cBreed: HF, Holstein Frisian; HF × AA, Holstein Frisian × Aberdeen Angus.
  4. dHouse: FV, fan ventilated; NV, naturally ventilated.