Table 2.
Estimations of vaccine effectiveness (VE) of an autogenous bacterin against Streptococcus suis in pigs during the nursery phase after removal of cohort 20, an influential observation determined through deviance residual analysis.
| Measure | Relative risk | 95% CI | P-value | VE (%) | 95% CI |
|---|---|---|---|---|---|
| Direct VE | 0.93a | 0.30, 2.92 | 0.902 | 7.0 | < 0, 70 |
| Indirect VE | 0.75 | 0.45, 1.35 | 0.277 | 24.4 | < 0, 55 |
| Total VE | 0.45 | 0.28, 0.75 | 0.002 | 54.2 | 25, 72 |
| Overall VE | 0.50 | 0.40, 0.82 | 0.002 | 50.0 | 18, 60 |
a
HR (hazard ratio) from Cox’s regression used as a substitute of RR (relative risk).
CI — confidence interval.