TABLE 3.
Associations between management and climate factors and feed coliform counts, with the feedlot effect controlled, in cattle feed samples in 635 pens on 68 feedlots sampled between May and August 2001
| Variable | β | SE | Pa | 95% confidence interval |
|---|---|---|---|---|
| Intercept | 6.3 | 0.58 | ||
| Mo of sampling | ||||
| May or June | Referent | |||
| July or August | −1.008 | 0.29 | 0.001 | −0.43, −1.59 |
| Corn silage in ration | ||||
| Yes | −1.14 | 0.29 | 0.000 | −1.71, −0.56 |
| No | Referent | |||
| Feed temp (°C) | −0.04 | 0.009 | 0.000 | −0.05, −0.018 |
| Wind velocity (ft/min) | 0.0004 | 0.0002 | 0.049 | 1.4 × 10−6, 0.0007 |
a
Wald chi-square statistics: overall R2, 0.239. Variance parameter estimates: feedlot, 1.14; residual, 1.006; fraction due to feedlot, 0.56.