Table 3 The results of models with logistic regression for the effect of Se and Se² presented by the intercept (a), regression coefficient of Se (b₁) and the regression coefficient of Se² (b₂) on mastitis and reproductive diseases during specified observational time and stratified into first, older or all lactations.

All mastitis treatments

   All

-10 + 30

-1.52 ± 0.25 ***

-12.1 ± 5.7*

43.6 ± 28.4 ^P=.12

   1^st

-10 + 30

-1.68 ± 0.31***

-9.83 ± 6.83 ^P=.15

38.3 ± 33.1 ^P=.25

   >1^st

-10 + 30

-1.33 ± 0.31***

-15.4 ± 7.1*

50.3 ± 34.5 ^P=.14

Treatments of severe/moderate clinical mastitis

   All

-10 to + 30

-2.37 ± 0.14***

-2.36 ± 1.21*

   1^st

-10 to + 30

-2.37 ± 0.18***

-1.67 ± 1.56 ^P=.28

   >1^st

-10 to + 30

-2.35 ± 0.19***

-3.65 ± 1.74*

Treatments of severe/moderate clinical mastitis

   All

-10 to +6

-2.71 ± 0.16***

-3.14 ± 1.42*

   1^st

-10 to +6

-2.77 ± 0.23***

-2.61 ± 0.20 ^P=.18

   >1^st

-10 to +6

-2.63 ± 0.20***

-4.15 ± 1.87*

SCC (as log), first measurement in lactation (corrected for lactation number and days in milk)

   All

+6 to +90

5.35 ± 0.10***

1.49 ± 0.58**

   1^st

+6 to +90

4.65 ± 0.12***

2.15 ± 0.64***

   >1^st

+6 to +90

5.43 ± 0.13***

0.85 ± 0.77 ^ns

SCC (as log), geometric mean of three measurements before 270 day in lactation (corrected for lactation number)

   All

+6 to +270

4.43 ± 0.06***

1.50 ± 0.49**

   1^st

+6 to +270

3.73 ± 0.06***

2.06 ± 0.58***

   >1^st

+6 to +270

4.48 ± 0.08***

1.02 ± 0.62^{P = 0.10}

Retained placenta

   All

0 + 5

-2.92 ± 0.36***

-10.98 ± 6.74 ^P=.10

51.4 ± 26.7*

Cystic ovaries

   All

0+150

-3.65 ± 0.27***

-7.06 ± 2.77**

Anoestrus/silent oestrus

   All

0+150

-2.89 ± 0.30***

-8.94 ± 3.34**

All disease treatments

   All

0+100

-1.01 ± 0.096***

-1.67 ± 0.89 ^P=.06