Table 3 Multivariate logistic regression analysis of risk factors associated with abortion diseases seroprevalence

History of infertility

Yes

4.1 (2.1,8.2)

0.0000

-

-

2.6 (1.4,4.7)

0.0001

No

Control of new introduction

Yes

2.05 (1.14,3.7)

0.01

-

-

0.3 (0.2,0.4)

0.000

No

Presence of lambing boxes

Yes

-

-

0.55 (0.3,0.9)

0.04

-

No

Common grazing

Yes

0.09 (0.05,0.16)

0.0000

0.25 (0.16,0.39)

 < 0.001

-

No

Exchanges of works with other farms

Yes

0 (0,Inf)

0.983

0 (0,Inf)

0.982

-

No

Common Watering point

Yes

3.8 (2.3,6.5)

0.0000

0.3 (0.16,0.6)

0.004

No

Presence of abortion in neighboring flocks

Yes

-

1.8 (1.2,2.7)

0.0000

0.5 (0.3,0.8)

0.002

No

Breed

Noir de Thibar / Barbarine

0.24 (0.1,0.4)

0.0000

0.7 (0.4, 1.2)

0.2

1.4 (0.7,2.4)

0.746

Queue Fine de l’Ouest/ Barbarine

1.18 (0.5,2.6)

0.6

1.05 (0.4,2.3)

0.9

1.1 (0.4,2.5)

0.7

Flock size

[size < 300]/[size > 300]

0.32 (0.19,0.53)

0.0000

-