Skip to main content
. 2015 Jul 10;10(7):e0131873. doi: 10.1371/journal.pone.0131873

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.