Table 4. Risk factors for RVFV seropositivity in Tanzania included in final multivariable mixed effects logistic regression model (herd was included as random effect variable).
Variable | OR | 95% CI | z value | p value | * Pearson Chi square | *DF | *p value |
---|---|---|---|---|---|---|---|
Water holding capacity of soils in the study areas | |||||||
Poor | 1.00 | Ref. | Ref. | Ref. | |||
Good | 1.97 | 1.58, 3.02 | 4.73 | < 0.001 | 22.36 | 1 | < 0.001 |
Age (years) | |||||||
1–2 | 1.00 | Ref. | Ref. | Ref. | |||
3 | 3.40 | 2.49, 4.64 | 7.73 | < 0.001 | |||
4–5 | 3.31 | 2.27, 4.82 | 6.25 | < 0.001 | 65.91 | 2 | < 0.001 |
Animal source | |||||||
Born within herd | 1.00 | Ref. | Ref. | Ref. | |||
Introduced into the herd | 5.08 | 2.74, 9.44 | 5.15 | < 0.001 | 26.51 | 1 | < 0.001 |
OR, odds ratio; CI, confidence interval; Ref, reference group; SE, Standard error; DE, Degree of freedom
* The effect of potential risk factors in the multivariable mixed-effects logistic regression model.