Table 7.
Logistic model of the probability of an edge starting from a detected infected cattle farm to join another detected infected cattle farm and with the same molecular type according to the type of edge.
| Variable | Parameter estimate | OR (95% CI) | P-value | AF (SD) |
|---|---|---|---|---|
| Intercept | −5.02 | 0.01 [0.00–0.02] | <0.0001 | - |
| T edge type | 1.96 | 7.13 [3.39–15.06] | <0.0001 | 12% (6.2) |
| P edge type | 0.30 | 1.35 [0.77–2.27] | 0.26 | 3% (7.4) |
| B edge type | 0.64 | 1.89 [1.32–2.76] | <0.0001 | 32% (8.6) |
| D edge type | 2.34 | 10.44 [4.38–26.66] | <0.0001 | 84% (6.9) |
| Size of the destination farm | −0.0045 | 0.956 [0.910–0.996] (*) | 0.049 | - |
| Size of the originating farm | 0.002 | 1.02 [0.99–1.06] (*) | 0.19 | - |
OR, Odds ratio; CI, Confidence Interval; AF, Attributable Risk Fraction; SD, Standard Deviation. (
*
) Odds-ratio corresponding to an increase of ten animals.