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Table 1 Univariate relationships between the natural logarithm of onset of luteal activity and study variables

From: Assessment of progesterone profiles and postpartum onset of luteal activity in spring calving Hereford beef suckler cattle

Variable

Group

n

β-value

S.E.

F-value

P-value

Calf 200-d weight

 

85

0.001

0.002

0.09

0.77

Calf 200-d weight

1st quartile

20

0.049

0.156

0.39

0.76

 

2nd quartile

24

0.148

0.143

  
 

3rd quartile

20

0.073

0.142

  
 

4th quartile

21

0.000

0.000

  

Calf birth weight

 

95

-0.036

0.011

11.49

0.001

Calf birth weight

1st quartile

21

0.337

0.132

3.80

0.01

 

2nd quartile

27

0.354

0.127

  
 

3rd quartile

21

0.050

0.118

  
 

4th quartile

24

0.000

0.000

  

Calf gender

Male

53

0.057

0.084

0.46

0.49

 

Female

55

0.000

0.000

  

Natural logarithm of previous calving interval

 

85

0.098

0.387

0.06

0.80

Maternal breeding value

 

102

0.006

0.006

1.07

0.30

Maternal breeding value

1st quartile

26

-0.026

0.151

0.02

1.00

 

2nd quartile

31

-0.023

0.145

  
 

3rd quartile

22

-0.040

0.162

  
 

4th quartile

23

0.000

0.000

  

Parity

1st

25

0.377

0.113

5.84

<0.01

 

2nd

17

0.210

0.117

  
 

>2nd

70

0.000

0.000

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