Table 4 Poisson regression for days with general appearance ≥ 2,a frequency and duration of diarrhea ≥ 3, b pneumonia, and days medicated during the overall (week 1–13) period as influenced by treatments containing age at group housing [G; late grouping (LG) vs. early grouping (EG)] and age at incremental hay supplementation [late hay increment (LH) vs. early hay increment (EH)].

From: Effects of group housing and incremental hay supplementation in calf starters at different ages on growth performance, behavior, and health

Item

Treatments

SEM

P value

LG-LH

LG-EH

EG-LH

EG-EH

Group housing (G)

Hay increment (H)

G × H

Days with general appearance ≥ 2

4.61

5.75

5.20

6.01

0.10

0.45

0.10

0.73

Diarrhea

Frequency, times diagnosed

0.85

0.83

0.95

1.12

0.24

0.45

0.78

0.71

Duration, d

3.87

4.41

4.17

4.31

0.12

0.83

0.51

0.70

Medicated, d

3.90

4.25

4.23

4.39

0.12

0.64

0.62

0.84

Pneumonia

Frequency, times diagnosed

0.98

1.10

0.75

1.32

0.22

0.87

0.18

0.37

Duration, d

2.37

2.27

1.86

2.53

0.16

0.69

0.45

0.31

Medicated, d

2.09

2.13

1.57

2.58

0.17

0.79

0.15

0.19

  1. a1 = normal and alert; 2 = ears drooped; 3 = head and ears drooped, dull eyes, slightly lethargic; 4 = head and ears drooped, dull eyes, lethargic; 5 = severely lethargic45.
  2. b1 = normal; 2 = soft to loose; 3 = loose to watery; 4 = watery, mucous, and slightly bloody; 5 = watery, mucous, and bloody.
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