Table 9.
Final models for health outcomes from arrival through 10 weeks.
| Outcome | Variable | Value | OR/Est | 95% CI/SE | p-value |
|---|---|---|---|---|---|
| BRD Morbidity | TxGroup | META | Ref | Ref | Ref |
| NO META | 2.76 | 1.59–4.80 | 0.0002 | ||
| Weight at arrival | 232 (kg) | Ref | Ref | Ref | |
| Difference (kg) | 0.98 | 0.96–0.99 | 0.012 | ||
| Crude Mortality | TxGroup | META | Ref | Ref | Ref |
| NO META | 1.24 | 0.38–4.08 | 0.72 | ||
| BRD treatment | Yes | 23.62 | 6.08–91.78 | <0.0001 | |
| No | Ref | Ref | Ref | ||
| Average daily gain | TxGroup | META | 0.21 | 0.08 | 0.006 |
| NO META | Ref | Ref | Ref |
BRD Morbidity is the number of animals treated at least once for BRD over first 10 weeks of study period. Mortality includes all animals who died through 10 weeks after arrival. Weight at arrival input is difference from median weight (232 kg). TxGroup, treatment group; BRD, bovine respiratory disease; ADG, average daily gain (kg/day); MH, Mannheimia haemolytica; MDR, multidrug resistant; Ref, reference; OR, Odds Ratio; CI, confidence interval; SE, standard error; Est, Restricted Maximum Likelihood estimate; META, tulathromycin metaphylaxis; NO META, no tulathromycin metaphylaxis.