Group

Intercept

Slope

R²

P Level

Control

All cows

1.35

−0.0011

0.086

<0.001

First lactation

1.10

−0.0003

0.022

<0.001

Mature cows

1.45

−0.0014

0.116

<0.001

Test

All cows

1.42

−0.0012

0.099

<0.001

First lactation

1.04

−0.0004

0.028

<0.001

Mature cows

1.57

−0.0016

0.131

<0.001