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Table 3 A comparison of packed cell volume (PCV) (in %) among different categories of dairy cows

From: Oriental theileriosis in dairy cows causes a significant milk production loss

Variable

PCV

 

Group ( n)

Mean differencea(Standard error)

95% Confidence intervala

P-valuea

Clinical and molecular test results

1 (16)

-14.36 (0.78)

-15.88, –12.83

<0.001

2 (14)

-4.48 (0.83)

-6.11, –2.86

<0.001

3 (254)

0.45 (0.26)

-0.06, 0.96

0.087

4 (319)

Reference group

Age (years)

≥ 6 (193)

1.77 (0.39)

1.02, 2.52

<0.001

3-5 (309)

1.93 (0.35)

1.24, 2.62

<0.001

≤ 2 (101)

Reference group

  1. Intercept for PCV was 24.9%.
  2. aMean difference was adjusted for three age categories (i.e., two years, three to five years, and six years and above).
  3. Group 1, with cardinal clinical signs of oriental theileriosis & molecular test-positive for T. orientalis; group 2, with mild or suspected signs of theileriosis & test-positive for T. orientalis; group 3, with no clinical signs & test-positive for T. orientalis; and group 4, with no clinical signs & test-negative for T. orientalis.
  4. P-values were obtained by comparing each category with the reference group.