Skip to main content

Table 3 Categorical variables of ‘production data’ and their levels collected from 1,127 suckling pigs

From: Individual risk factors for Mycoplasma hyopneumoniae infections in suckling pigs at the age of weaning

Variable

Level

All piglets

Mhyo neg.

Mhyo pos.

  

(n)

(%)1

n (%)1

n (%)1

Gender

Male

572

50.8

554 (51.0)

18 (43.9)

Female

555

49.2

532 (49.0)

23 (56.1)

Health status after birth

Good

1091

96.8

1051 (96.8)

40 (97.6)

Moderate/poor

36

3.2

35 (3.2)

1 (2.2)

Special health conditions

None

1026

91.0

990 (91.2)

36 (87.8)

Congenital conditions

55

4.9

53 (4.9)

2 (4.9)

Others (e.g. injuries)

46

4.1

43 (3.9)

3 (7.3)

Suckled teatx

1st or 2nd pair from cranial

328

29.1

320 (29.5)

8 (19.5)

 

3rd or 4th pair from cranial

327

29.0

311 (28.6)

16 (39.0)

 

5th to last pair from cranial

181

12.1

173 (15.9)

8 (19.5)

 

Varying

291

25.8

282 (26.0)

9 (22.0)

Cross-fostered

No

946

83.9

911 (83.9)

35 (85.4)

Yes

181

16.1

175 (16.1)

6 (14.6)

Individual contact to new litter mates from other sows due to cross-fostering

No

691

61.3

670 (61.7)

21 (51.2)

To piglets from negative sows

152

13.5

146 (13.4)

6 (14.6)

To piglets from positive sows

21

1.9

21 (1.9)

0 (0.0)

To piglets from sowsne

263

23.3

249 (22.9)

14 (34.2)

Individual contact to piglets either negative or positive for M. hyopneumoniae

No

385

34.2

385 (35.5)

0 (0.0)

To foreign negative piglets

368

32.7

368 (33.9)

0 (0.0)

To foreign positive piglets

36

3.2

36 (3.3)

0 (0.0)

To positive litter mates

338

30.0

297 (27.3)

41 (100)

Cross-fostering of piglets into

Neighbouring pen

26

14.4

25 (14.3)

1 (16.7)

Pen in the same compartment

106

58.6

104 (59.4)

2 (33.3)

 

Pen in another compartment

49

27.0

46 (26.3)

3 (50.0)

Time of cross-fostering

Day of birth

85

47.0

84 (48.0)

1 (16.7)

1. day of life

12

6.6

12 (6.9)

0 (0.0)

2.-7. day of life

46

25.4

43 (24.6)

3 (50.0)

 

8.-21. day of life

38

21.0

36 (20.6)

2 (33.3)

  1. Using PCR results from suckling pigs´ nasal swabs as a binomial outcome variable, the incidence rate ratio (IRR; recognizing the first level of each variable as baseline in a univariable Poisson regression analysis) were calculated.
  2. ne not examined for M. hyopneumoniae.
  3. xbased on ≥3 identical results assessed during 5 days of observation.
  4. 1 column-percent per variable.
Back to article page

Acta Veterinaria Scandinavica

ISSN: 1751-0147