From: Evaluating the control of HPAIV H5N1 in Vietnam: virus transmission within infected flocks reported before and after vaccination
Variable
OR (95%CI)
P
Flock Size (Ref: <50 head)
>50-500 head
0.202 (0.115,0.355)
<0.001
>500-1,500 head
0.134 (0.067,0.269)
>1,500 head
0.209 (0.094,0.464)
Epidemic wave (Ref: Period I)
Period II
3.114 (1.785,5.432)