Table 3. Final logistic regression model for risk factors for C. burnetii infection of ruminants, Reunion Island (71 farms; 2011–2012).
| Variables | Estimate* | SE (standard error) | P-value | Odds Ratio and 95% CI | |
| Exposure to winds | No | - | - | - | - |
| Yes | 0.747 | 0.321 | 0.019 | 2.11 [1.13; 3.99] | |
| Animals kept in the farm at night | No | - | - | - | - |
| Yes | −0.641 | 0.319 | 0.044 | 0.53 [0.01; 0.77] | |
| Quarantine | No | - | - | - | - |
| Yes | −2.838 | 0.616 | 4.18.10−6 | 0.06 [0.01; 0.17] | |
| No specific protection for a visitor entering the farm | No | - | - | - | - |
| Yes | 1.141 | 0.366 | 1.84.10−3 | 3.13 [1.57; 6.70] | |
*Intercept = -3.18; Model deviance = 44.25; AIC = 116.71, model df = 7 (p<0,001).