Table 3.
Conditional logistic-regression analysis of 20 oxfendazole treated/non-treated pig case–control pairs (Outcome: Pig test status (seropositive or negative) at 12 months of age; stratum variable: Farm/herd ID)
| Factor | Beta | Standard error (Beta) | Odds ratio |
|---|---|---|---|
| Model 1(Treatment status) | |||
| Control | Referent | – | 1.0 |
| Group T1 | − 22.4 | 54,800 | 1.869 × (10)−10 |
| Group T2 | − 22.4 | 54,800 | 1.869 × (10)−10 |
| Likelihood ratio test = 2.36, p = 0.308 | |||
| Model 2 (Sex) | |||
| Female | Referent | – | 1.0 |
| Male | 20.8 | 41,800 | 1.079 × (10)9 |
| Likelihood ratio test = 0.97, p = 0.324 | |||
| Model 3 (time pig allowed to roam/scavenge in a day) | |||
| Less than 2 h | Referent | – | 1.0 |
| More than 2 h | 0.594 | 1.13 × (10)8 | 1.81 |
| Likelihood ratio test = 0, p = 1 | |||
| Model 4 (Pig rearing experience) | |||
| Less than 12 years | Referent | – | 1.0 |
| More than 12 years | 1.06 | 1.00 × (10)8 | 2.886 |
| Likelihood ratio test = 0, p = 1 | |||
*95% CI: Inestimable