Table 2.
Descriptive analysis of characteristics and Salmonella seroprevalence of 120 weaned piglets included in the clinical trial with organic acids.
| Variable | Control group | Intervention group | P -value for group difference | ||
|---|---|---|---|---|---|
| frequency | Relative frequency | Absolute frequency | Relative frequency | ||
| Sex | |||||
| Female | 35 | 58.3% | 31 | 51.7% | 0.22 |
| Castrated | 14 | 23.3% | 10 | 16.7% | |
| Male | 11 | 18.3% | 19 | 31.7% | |
| Line | |||||
| Breeder | 17 | 28.3% | 12 | 20.0% | 0.29 |
| Finisher | 43 | 71.7% | 48 | 80.0% | |
| Salmonella seroprevalence | |||||
| Positive at T1a | 1 | 1.7% | 1 | 1.7% | 1 |
| Positive at T2 | 28 | 47.7% | 11 | 18.3% | <0.001 |
| Positive at T3 | 46 | 76.7% | 37 | 61.7% | 0.075 |
| Variable | Median | IQR | Median | IQR | P -value for group difference |
| Age (days) at T1 | 42 | 3 | 42 | 2 | 0.97 |
| Weight (kg) at T1 | 15 | 3 | 14 | 3 | 0.11 |
| Total | 60 | 100% | 60 | 100% | |
a
T1–T3 is the three times that Salmonella seroprevalence was measured during the trial where T1 was at the beginning of the trial, when the pigs were 6 weeks old, T2 at 11 weeks of age, and T3 at 23 weeks of age.