Table 8.

Results of the final multivariate model for E. coli O157 shedding in a cohort of 52 dairy heifers. This GLMM included all significant fixed effects with animal as a random effect. Climate factors were counted as the number of days a set value was exceeded in the previous 7 days, with the exception of temperature which was counted over 14 days. Results were categorized to three levels, with the exception of relative humidity which had three data levels only

Factor	P	Level	Probability
Rainfall	0·02	0	46·34
		Low	59·29
		High	71·02
Relative humidity	<0·001	0	42·2
		1	65·34
		2	69·14
Temperature	<0·001	Low	36·37
		Med	67·27
		High	72·42
Solar exposure	0·017	Low	49·86
		Med	69·44
		High	57·71
Pasture growth	0·013	0	51·15
		Low	51·85
		High	73·22
Body score	0·029	2	49·76
		3	58·6
		4	68·74