Table 5.

Pre-selected parameters for EHEC modelling found to be correlated at P < 0·05

Parameter	Hygiene score	Avg. weekly humidity (%)	Cow contact	Parity	Days in milk	Avg. weekly temp. (°F)	Any treatment	Antibiotic or other treatment	Weekly precip. (inches)
Hygiene score		×		×	×	×			×
Avg. weekly humidity (%)	×		×		×	×	×
Cow contact				×	×	×	×		×
Parity	×		×			×	×	×	×
Days in milk	×	×	×				×	×	×
Avg weekly temp (°F)	×		×	×				×	×
Any disease or treatment		×	×	×	×
Antibiotic or other treatment		×		×	×	×			×
Weekly precip. (inches)	×	×	×	×	×	×		×

EHEC, Enterohaemorrhagic E. coli.