Table 3.

Final logistic regression model output showing a significant increase in Escherichia coli prevalence with temperature.

E. coli O157	OR	SE	z	P	95%	CI
Temperature	1.193132	0.0708786	2.97	0.003	1.061995	1.340462
Sampling	0.4937161	0.0966556	-3.61	0.000	0.3363847	0.7246335

E. coli, Escherichia coli; OR, odds ratio; SE, standard error; CI, confidence interval. Random-effects logistic regression: number of observations=285; group variable=animal; number of groups=54; Log likelihood=-53.380248. Likelihood-ratio test: LR chi-square=0.56. Assumption: final model nested in full model P=0.7548; Wald chi-square=13.57 P=0.0011.