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Table 4 Parameter estimates (standard error in parenthesis) for the mortality rate (sqrtMORT) in each company studieda

From: Managing variability in decision making in swine growing-finishing units

Variable

Companies

 

A

B

C

D

E

F

G

ODb

Intercept

2.28 (0.46)***

1.92 (0.74)*

2.58 (0.67)***

2.23 (0.36)***

3.06 (0.64)***

1.48 (0.35)***

1.53 (0.42)***

2.25 (0.18)***

Autonomous community

        

 Cataluña

S

U

0.25 (0.13)****

U

U

U

S

S

 Castilla y León

S

U

A

U

U

U

S

S

 Valencia

S

U

−0.09 (0.18)

U

U

U

S

S

 Other

S

U

A

U

U

U

S

S

 Aragón

S

U

U

U

U

S

S

Trimester of placement

        

 Jan-Feb-Mar

A

−0.05 (0.12)

A

S

0.30 (0.13)*

A

S

−0.07 (0.06)

 Apr-May-Jun

−0.04 (0.09)****

−0.45 (0.12)***

−0.25 (0.13)*

S

−0.14 (0.13)

−0.35 (0.16)*

S

−0.26 (0.05)***

 Jul-Aug-Sep

A

−0.43 (0.14)**

A

S

−0.17 (0.12)

A

S

−0.28 (0.06)***

 Oct-Nov-Dec

S

S

Circovirus vaccine

        

 No

0.57 (0.09)***

A

S

U

U

U

U

S

 Yes

A

S

U

U

U

U

S

Number of pig origins

        

 One origin

S

−0.16 (0.11)****

−0.38 (0.15)**

U

U

U

−0.17 (0.08)*

−0.37 (0.05)***

 More than one origin

S

U

U

U

Herd age

        

 <10 years

A

S

U

S

S

S

A

 10 to 30 years

A

S

U

S

0.18 (0.09)*

S

S

A

 >30 years

A

S

U

S

A

S

S

A

Percentage of slatted floor

        

 <50 % slatted

U

−0.18 (0.10)****

S

S

A

S

S

S

 ≥50 % slatted

U

S

S

A

S

S

S

Ventilation control system

        

 Manual

U

U

U

S

S

U

 Automatic

U

−0.23 (0.12)*

U

U

S

S

U

−0.25 (0.05)***

Route utilized to perform treatments

        

 Feed

U

U

U

U

A

U

A

 Feed + Water

U

0.19 (0.10)*

U

U

U

A

U

A

 Feed + Water + Injection

U

A

U

U

U

A

U

A

Water source in the farm

        

 Well

−0.07 (0.13)

S

A

U

A

U

U

A

 River

0.16 (0.08)*

S

A

U

A

U

U

A

 Other

0.04 (0.14)

S

A

U

−1.92 (0.84)*

U

U

A

 Public supply

S

A

U

U

U

A

Number of animals placed

        

 <800 pigs

S

S

S

S

S

 800-2000 pigs

S

0.23 (0.10)*

S

S

S

0.36 (0.17)*

S

0.29 (0.06)***

 >2000 pigs

S

A

S

S

S

0.63 (0.29)*

S

0.33 (0.07)***

Initial body weight

−0.03 (0.02)

−0.001 (0.03)

0.01 (0.03)

−0.04 (0.02)****

−0.07 (0.04)*

0.01 (0.02)

0.02 (0.02)

−0.001 (0.008)

Trimester * Circovirus vaccine

        

 Apr-May-Jun / No vaccinated

0.41 (0.20)*

U

U

U

U

U

U

U

 / Vaccinated

U

U

U

U

U

U

U

 Oct-Nov-Dec / No vaccinated

U

U

U

U

U

U

U

 / Vaccinated

U

U

U

U

U

U

U

Initial BW * Water source

        

 Initial BW / Public wáter

U

U

U

U

U

U

U

 / Other

U

U

U

U

0.10 (0.05)*

U

U

U

  1. S - variable was not selected to the final model; U - variable non-used in the model because it did not present variability; A - variable not available
  2. (−) Reference level for a factor included in the multiple regression models
  3. * P < 0.05; ** P < 0.01; *** P < 0.001; **** P < 0.10
  4. aData from 688 batches for companies A to F and 607 batches for OD. Variables not significant with respect to sqrtMORT in all companies studied and in OD were not described at the table
  5. bOD - overall database. Data from ¨company G¨ was not included