Table 3.

Relationships among super-shedder status (yes/no), sampling (1 vs 2) and membership in the most prevalent restriction endonuclease digestion pattern cluster, REPC A , as compared to all other REPC for fecal isolates of E. coli O157:H7 collected in Alberta Canada in 2007 from generalized linear mixed model analysis^z

Variable	Odds Ratio	95% C.I.	Significance
Sampling	1.27	0.68 – 4.37	P = 0.18
Super-shedder	0.98	0.64 – 1.51	P = 0.94

^zPen as random effect with covariance parameter estimate = 1.48 and standard error = 0.83.