Skip to main content

Table 2 The distribution of independent variables among 46 surveyed farms

From: The epidemiology of Clostridium perfringens type A on Ontario swine farms, with special reference to cpb2-positive isolates

Independent Variable

Percentage of Cpb2-positive farms

Univariable analysisP-value (sample level)

Type of operation (sample n = 220)

Farrowing (farm n = 30)

73

0.012

 

Grower-finisher (farm n = 16)

25

 

Other species (sample n = 212)

Not present (farm n = 23)

57

0.004

 

Present (farm n = 23)

57

 

Herd Size (sample n = 217)

Small (<1000) (farm n = 9)

33

Referent

 

Medium (≥1000-3000) (farm n = 28)

61

0.272

 

Large (>3000) (farm n = 9)

67

0.018

Sow Flow (sample n = 84)

All-in/all-out (farm n = 16)

75

0.417

 

Continuous (farm n = 14)

71

 

Weanling Flow (sample n = 15)

All-in/all-out (farm n = 23)

70

0.326

 

Continuous (farm n = 8)

87.5

 

Grower-Finisher Flow (sample n = 20)

All-in/all-out (farm n = 27)

48

0.327

 

Continuous (farm n = 13)

54

 

Antibiotic usage (sample n = 66)

Yes (farm n = 7)

100

0.304*

 

No (farm n = 23)

65

 

Diarrhea (sample n = 58)

Yes (farm n = 11)

82

0.792*

 

No (farm n = 19)

68

 
  1. *Exact logistic regression.