3.1.1 Logistic regression part
Farms located in Western Greece are less likely to be PCV2 seropositive (OR 0.25 (95% CI 0.07; 0.71)) compared to farms located in other regions of Greece (Southern / Northern / Eastern Greece). Also, pools from breeding stock are more likely to be associated with positive CT values compared to pools from weaners [OR 0.21 (95% CI 0.09; 0.46) and growers (OR 0.36 (95% CI 0.17; 0.75)]. Vaccination of sows for PRRSV and weaners for PCV2 is associated with small probability of PCV2 seropositivity compared to other applied vaccination programs (OR 0.39 (95% CI 0.21; 0.74).