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Table 5 Effect of breed, class of somatic cell counts and farm on cortisol concentration in milk of dairy cows in study 2. Data are reported as estimated means of natural logarithm of cortisol (pg/ml)

From: Factors affecting milk cortisol in mid lactating dairy cows

 

Mean

Se

Breed

  

IH

6.43

0.07A

IS

5.94

0.06B

Class

  

#1

6.15

0.02a

#2

6.14

0.05a

#3

6.27

0.04b

Farm

  

F1

6.02

0.05AB

F4

6.10

0.05B

F5

6.19

0.06BC

F10

6.05

0.07AB

F2

6.04

0.05AB

F3

6.33

0.06C

F6

5.85

0.08A

F7

6.37

0.04C

F8

6.36

0.05C

F9

6.01

0.06AB

DIM

0.001

0.001Ns

Milk yield

0.001

0.003Ns

General mean

6.19

0.03

  1. Covariates appearing in the model are evaluated at the following values for Milk cortisol of Model 1: DIM = 159.57, Milk, kg/d = 31.30; F1 to F10 farm 1 to farm10, se standard error, DIM days in milking
  2. a, b on the same column denote significant differences for P < 0.05; A, B, C on the same column denote significant differences for P < 0.01; Ns: not significant