The association between exploratory variables previously selected and the dependent variable was investigated using a
Generalized Estimating Equations (GEE) model.
C.burnetii seropositivity was used as dependent variable, and the herd was included as a random effect. Additionally, the “month of sampling” was introduced as a new variable to add a time period to the model. It was codified from 1 (June2008) to 31 (December 2010).