Table 3.
Animal factors demonstrating a significant effect on super-shedding of E. coli O157 in a cohort of 52 dairy heifers, identified by logistic regression
| Parameter | n | Estimate | s.e. | 95% CI | P | OR |
|---|---|---|---|---|---|---|
| Hide score 1 | 420 | −3·296 | 0·263 | −3·811 to −2·781 | n.a. | 1 |
| Hide score 2 | 330 | −0·693 | 0·485 | −1·645 to 0·259 | 0·153 | 0·500 |
| Hide score ⩾3 | 92 | 0·799 | 0·473 | −0·128 to 1·726 | 0·091 | 2·224 |
| Faecal score 1 | 48 | −3·135 | 0·722 | −4·551 to −1·72 | n.a. | 1 |
| Faecal score 2 | 184 | −2·07 | 1·22 | −4·461 to 0·315 | 0·089 | 0·126 |
| Faecal score 3 | 585 | −0·107 | 0·754 | −1·585 to 1·372 | 0·887 | 0·899 |
| Faecal score 4 | 25 | 1·143 | 0·949 | −0·717 to 3·003 | 0·228 | 3·136 |
s.e. Standard error; CI, confidence interval; OR, odds ratio; n.a., not applicable as the reference level.