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Table 2 Final multivariable logistic model for Outcome 1a for the Scotland data

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

Variable

Value

Coefficient

OR

[95% CI]

p-value

Intercept

 

−1.04

 

0.040

breeding females brought on (BFBO)

No

Baseline

1.00

 

Yes

1.71

5.52 [1.81–16.89]

0.003

cattle 12–30 months

 

0.009

1.009 [1.001–1.02]

0.028

bought other livestock

No

Baseline

1.00

 

Yes

−1.45

0.23 [0.07–0.75]

0.015

season

Autumn

Baseline

1.00

 

Winter

−0.53

0.59 [0.16–2.20]

0.433

Spring

−2.33

0.10 [0.02–0.56]

0.009

Summer

−0.45

0.64 [0.18–2.30]

0.493

  1. OR Odds ratio; CI Confidence Interval
  2. Significant (p ≤ 0.05) OR and p-values are highlighted in bold text
  3. McFadden’s pseudo R2 = 0.21
  4. a Farm classified as positive for E. coli O157