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Table 5 Factors associated with predicted calving rate in cattle herds in Northern Nigeria: results of a multiple linear regression model

From: Brucellosis, genital campylobacteriosis and other factors affecting calving rate of cattle in three states of Northern Nigeria

Risk factor and level

Coefficient

95% CI

P - value

Brucella infection

   

 No

1

-

-

 Yes

-14.9

-20.01, -9.62

<0.001

Campylobacter fetus infection

   

 No

   

 Yes

-8.41

-12.93, -3.88

<0.001

State

   

 Adamawa

1

-

-

 Kaduna

1.76

-2.84, 6.35

0.452

 Kano

-0.24

-5.40, 4.92

0.928

Supplementary feeding

   

 None

1

-

-

 Fodder and bran

6.54

0.46, 12.63

0.044

 Concentrate

7.86

0.46, 15.30

0.037

Mineral supplementation

   

 No

1

  

 Yes

6.45

1.71, 11.20

0.008

Isolation and observation of cow during parturition and removal of afterbirth

   

 No

1

  

 Yes

7.54

3.09, 11.98

0.001

Small ruminants

   

 No

1

-

-

 Yes

-7.81

-12.41, -3.22

0.001

Buy in new animals

   

 Closed herd

1

-

-

 Buy <3 + quarantine

-6.44

-12.53, -0.38

0.038

 Buy >3 or no quarantine

-15.23

-20.31, -10.16

<0.001

Presence of crush, chute or other form of restraint on the farm

   

 No

1

-

-

 Yes

-9.97

-16.08, -3.76

0.002

Herd size

   

 ≤ 15

1

-

 

 > 15

4.98

1.17, 8.80

0.011