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Table 3 Multiple linear regressions analyses by payment class based on milk quality according to bulk tank somatic cell count (BTSCC) means and standard deviations (in this analysis only class 1, 2, 3 and 4 were used)

From: Month-wise variation and prediction of bulk tank somatic cell count in Brazilian dairy herds and its impact on payment based on milk quality

Class Variable Estimated parameter Std. Error3 p-value* R2-Adjusted
Class 11 Intercept 11.87 2.98 0.001 0.88
BTSCC mean 1.83−4 2.17−5 <0.001
Standard deviation 8.39−5 1.00−5 <0.001
Class 21,2 Intercept 0.66 0.07 <0.001 0.88
BTSCC mean 2.27−6 2.33−7 <0.001
Standard deviation 9.69−7 1.32−7 <0.001
Class 31,2 Intercept 0.52 0.20 0.324 0.74
BTSCC mean 2.32−6 4.49−7 0.001
Standard deviation −1.61−7 1.42−7 0.292
Class 41,2 Intercept −0.05 0.07 0.456 0.93
BTSCC mean 2.07−6 1.04−7 <0.001
Standard deviation 7.37−8 9.03−8 0.421
  1. *Statistically significant difference considered p < 0.05; 1Class 1–1000 to 200,000 cells/mL, Class 2–201,000 to 400,000 cells/mL, Class 3–401,000 to 500,000 cells/mL, Class 4–501,000 to 800,000 cells/mL, Class 5 - > 800,000 cells/mL; 2dependent variable was transformed to log10; 3Standard error