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Table 2 Correlations between dependent and independent variables on day 4 after infection

From: Actinobacillus pleuropneumoniae challenge in swine: diagnostic of lung alterations by infrared thermography

Influencing variables

Dependent variables

Pearsson's correlation coefficient, p- (probability) value, number of pigs

Temperature difference between thoracal and abdominal region on the left body site

Temperature difference between thoracal and abdominal region on the right body site

Left thoracal temperature

Right thoracal temperature

Infected

Control

Infected

Control

Infected

Control

Infected

Control

Age (living days)

0.07

0.42

-0.04

0.72

-0.08

-0.38

-0.03

-0.33

0.63

0.23

0.78

0.02

0.58

0.28

0.85

0.36

47

10

47

10

47

10

47

10

Body weight (kg)

-0.01

0.52

0.01

0.50

0.33

-0.18

0.35

0.05

0.96

0.12

0.93

0.14

0.02

0.62

0.01

0.89

47

10

47

10

47

10

47

10

Clinical score

0.06

0.28

-0.18

0.43

-0.54

-0.26

- 0.51

0.06

0.67

0.43

0.22

0.22

<0.01

0.46

<0.01

0.87

47

10

47

10

47

10

47

10

Computed tomography score

-0.13

0.41

-0.30

0.47

-0.12

0.18

-0.12

-0.23

0.40

0.23

0.04

0.17

0.43

0.62

0.42

0.53

46

10

46

10

46

10

46

10

Breathing frequency (per minute)

-0.11

-0.08

-0.05

-0.20

0.29

0.44

0.27

0.14

0.45

0.82

0.76

0.58

0.05

0.21

0.07

0.70

46

10

46

10

46

10

46

10

Heart rate (per minute)

0.09

0.32

-0.03

0.09

0.07

- 0.65

0.08

-0.45

0.54

0.36

0.86

0.81

0.64

0.04

0.60

0.19

46

10

46

10

46

10

46

10

Body temperature (rectal)

0.34

-0.35

0.38

-0.37

0.30

0.83

0.18

0.82

0.02

0.33

<0.01

0.29

0.05

<0.01

0.22

<0.01

46

10

46

10

46

10

46

10

Ambient temperature (°C)

0.03

-0.53

-0.00

-0.21

0.75

0.31

0.78

0.64

0.89

0.11

0.98

0.56

<0.01

0.38

<0.01

0.04

46

10

46

10

46

10

46

10

Abdominal temperature (left,°C)

-0.01

-0.21

0.31

-0.28

0.96

0.75

0.94

0.89

0.93

0.56

0.04

0.44

<0.01

0.01

<0.01

<0.01

47

10

47

10

47

10

47

10

Abdominal temperature (right,°C)

-0.10

-0.20

0.31

-0.04

0.93

0.58

0.94

0.94

0.52

0.58

0.04

0.92

<0.01

0.08

<0.01

<0.01

47

10

47

10

47

10

47

10

Lung lesion score

-0.21

-0.43

- 0.31

-0.45

-0.11

0.51

-0.11

0.38

0.15

0.22

0.04

0.19

0.48

0.13

0.48

0.27

  1. Surface skin temperatures as well as temperature differences between thoracal and abdominal regions on the left and right body sites were influenced by several internal and external factors. Pearsson's Correlation Coefficients (upper lines) between dependent and influencing variables, their levels of significance (middle lines) and the number of evaluated pigs (lower line) are shown. From 50 infected pigs three pigs had died prior to day 4 after infection.