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Table 3 Final multivariable logistic model for Outcome 1a for a. the England & Wales data; b. the combined data sets

From: The British E. coli O157 in cattle study (BECS): factors associated with the occurrence of E. coli O157 from contemporaneous cross-sectional surveys

 

a. England & Wales

b. Scotland + England & Wales

Variable

Value

Coefficient

OR

[95% CI]

p-value

Coefficient

OR

[95% CI]

p-value

Intercept

 

−2.03

 

< 0.0001

−1.71

 

< 0.0001

total cattle

 

0.005

1.005 [1.002–1.009]

0.001

0.003

1.003 [1.001–1.004]

0.008

survey

Scotland

N/A

Baseline

1.00

 

England & Wales

0.08

1.083 [0.587–1.999]

0.798

  1. a Farm classified as positive for E. coli O157
  2. OR Odds ratio; CI Confidence Interval; N/A not applicable
  3. Significant (p ≤ 0.05) OR and p-values are highlighted in bold text
  4. Model a. McFadden’s pseudo R2 = 0.09; Model b. McFadden’s pseudo R2 = 0.03