Table 1 Study subject parity, age, duration in feeding trial, and timing of calf’s sample collection

Lactation (parity)

1

12

13

2

10

8

3

6

6

4

3

3

5

2

1

Total

33

31

0.36^a

Mean

2.2

2.1

SD

1.2

1.2

Age (years)

Mean

3.2

3.1

0.69^b

SD

1.4

1.3

Duration in Feeding Trial (days)

Mean

42.1

42.9

0.66^b

SD

10.0

10.5

Range

16-60

18-66

Age of Calf Sample Collection (days)

0

12

13

1

12

7

2

6

6

3

1

3

Total

31

29

0.49^a

Mean

0.9

1.0

SD

0.8

1.1