Skip to main content

Table 2 Results of the multivariable logistic regression models

From: Use of data mining techniques to investigate disease risk classification as a proxy for compromised biosecurity of cattle herds in Wales

  Model 1 Model 2 Model 3
Variable names OR P value 95% CI OR P value 95% CI OR P value 95% CI
Average number of cattle in the area surrounding the holding's location (CATDENSITY (binary) > 2630 2.46 P < 0.001 1.84–3.3 2.62 P < 0.001 1.88–3.64 2.59 P < 0.001 1.92–3.5
Herd size (HERDSIZE) (categorical) < 30          
   30–88 3.86 P < 0.001 2.81–3 3.22 P < 0.001 2.23–4.64 3.77 P < 0.001 2.75–5.2
   > 88 10.34 P < 0.001 7.65–11 6.62 P < 0.001 4.55–9.63 9.4 P < 0.001 6.9–12.8
Total farmed area (FARMA) (categorical) < = 40Ha     1.26* P = 0.001 1.09–1.45    
   41–100Ha        1.15 P = 0.183 0.93–1.43
   > 100Ha        1.31 P = 0.007 1.07–1.6
Within or at less than 5 Km to an Area of Outstanding Natural Beauty (5KMAONB) (binary) Yes 0.69 P = 0.023 0.5–0.95 0.63 P = 0.01 0.44–0.7 0.7 P-0.027 0.5–0.96
Total rainfall in 2003 (TOTRAIN) 0.77 P < 0.001 0.68–0.88 0.77 P < 0.001 0.67–0.87 0.76   0.67–0.87
Annual average surface temperature in 2003 (AVETEMP) (categorical) < 9°C 0.81* P = 0.003 0.7–0.93       
   > = 9–11°C     0.88 P = 0.299 0.77–1.11 0.8 P = 0.043 0.64–0.99
   > = 11°C     0.72 P = 0.044 0.53–0.99 0.68 P = 0.007 0.51–0.9
Registered movements on/off in CTS during 2004 (OPENCLOSED) (binary) Yes 6.08 P < 0.001 2.98–12.4 2.18 P = 0.095 0.87–5.44 6.2 P < 0.001 3–12.74
  1. Model 1: No. observations: 10,036. Variables with less 30% missing values
  2. Model 2: No. observations: 7,412. Model 1 plus FARMA. No imputation.
  3. Model 3: No. observations: 10,036 Model 1 plus FARMA with imputed missing values (mean)
  4. OR based on linear association