Table 3.

Models used to quantify transmission of MRSA within pig herds

Model	Transmission parameter estimation1)	Used data
Basic	TP1 = exp (log β0)	Denmark / Netherlands
Bivariable	TP2 = exp (log β0 + log β1(ab) + log β2(pIP))	Denmark / Netherlands
Multivariable	TP3 = exp (log β0 + log β1(ab) + log β2(pIP) + log β3(age))	Netherlands

1) In all models log (IP·Δt) was used as offset variable.

ab: use of tetracyclins or β-lactams (yes/no); age: age of pigs (pre-weaning/post-weaning); pIP: infection pressure within the pen divided by total infection pressure (continuous variable).