Table 3 Summary of results of logistic regression analysis on Influenza A Virus (IAV) positive detection on survey data collected from 176 swine farms in Colombia in 2016-17. Farms were tested for IAV using rRT-PCR on nasal swabs and oral fluids. Table show results of the final model after controlling potential confounding factors and assessing plausible interactions

Intercept

-5.62

1.62

0.003

0.00

0.08

-

-

Farm size (V5)

1001–7500

3.55

1.11

34.9

3.92

311.8

0.39

2.54

301–1000

2.18

0.67

8.88

2.38

33.06

0.28

3.50

Facilities are allowed to dry after cleaning and disinfecting (V20)

Yes

3.21

1.55

24.89

1.18

524.3

0.97

1.02

Location in an area with a high density of pigs in the region (V1)

> 10 an/km²

1.61

0.59

5.05

1.56

16.3

0.44

2.25

Farm size (V5): Location in an area with a high density of pigs in the region (V1)

1001–7500: >10an/km2

-1.20

1.25

0.29

0.02

3.4

0.40

2.48

01-1000: >10an/km2

-1.30

0.76

0.27

0.06

1.2

0.27

3.58