Table 4 Factorial discriminant analysis on behavioural signs in 6 old and 6 young Holstein cows under LPS CHALLENGE and CONTROL situations at T−1 h, T + 3 h, T + 6 h, T + 12 h and T + 24 h after intravenous injection of LPS (0.5 µg/kg of BW) (or equivalent time in the CONTROL situation): proportion of variance explained by each component, and variable-to-component correlations.

From: Combining accelerometers and direct visual observations to detect sickness and pain in cows of different ages submitted to systemic inflammation

Factorial discriminant analysis

Component 1

Component 2

Proportion of total variance explained by component (%)

21.50

20.10

Contribution of each variable to component

Variables

Abbreviations

  

Strained nostrils: Yes

Nose.Yes

0.88

0.45

Motivated to feed: No

Motiv.No

0.84

−0.03

Dyspnea and/or tremor: Yes

Other.Yes

0.68

0.20

Time spent without moving

Without moving

0.67

−0.59

Apathy: Yes

Apath.Yes

0.59

0.08

Pressed tail: Yes

Tail.Yes

0.56

0.16

Feeding activity: No

Feed.No

0.50

−0.13

Eyelids wide open: Yes

Eye.Yes

0.48

0.46

Head down: Yes

Head.Yes

0.45

0.17

Hunched back: Yes

Back.Yes

0.40

−0.01

Resting: No

Rest.No

0.14

0.31

Time spent standing

Standing

0.11

−0.39

Resting: Yes

Rest.Yes

−0.14

−0.31

Time spent ruminating

Ruminating

−0.35

0.31

Hunched back: No

Back.No

−0.40

0.01

Head down: No

Head.No

−0.45

−0.17

Time spent ingesting

Ingesting

−0.47

0.45

Eyelids wide open: No

Eye.No

−0.48

−0.46

Feeding activity: Yes

Feed.Yes

−0.50

0.13

Pressed tail: No

Tail.No

−0.56

−0.16

Apathy: No

Apath.No

−0.59

−0.08

Dyspnoea and/or tremor: No

Other.No

−0.68

−0.20

Motivated to feed: Yes

Motiv.Yes

−0.84

0.03

Strained nostrils: No

Nose.No

−0.88

−0.45

Back to article page