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Table 3 Mixed-effects multi-level logistic regression analysis for influenza A virus (IAV) seropositivity

From: Antibody responses to porcine reproductive and respiratory syndrome virus, influenza A virus, and Mycoplasma hyopneumoniae from weaning to the end of the finisher stage in fourteen groups of pigs in Ontario, Canada

Parameter

Odds ratio

Standard error

95% confidence interval

p-value

M. hyo seropositivity

 No

Referent

   

 Yes

1.66

0.31

1.15–2.41

0.007

Production stage

 At weaning

3.10

0.54

2.20–4.35

<  0.001

 End of nursery

Referent

   

 End of grower

2.30

0.40

1.63–3.22

< 0.001

 End of finisher

2.89

0.52

2.03–4.10

< 0.001

Cohorta

 One

Referent

   

 Two

3.64

0.98

2.15–6.16

< 0.001

  1. This table displays the mixed-effects multi-level logistic regression analysis for influenza A virus (IAV) seropositivity with farrowing source and sow as random effects in 9 seropositive groups that had more than 20% of pigs test seropositive to IAV by ELISA
  2. M. hyo = Mycoplasma hyopneumoniae
  3. aCohort One: Pigs were born between May and August; Cohort Two: Pigs were born between October and January