Table 1 Univariate analysis (chi-square) of individual potential risk factors (species, age, and origin) for Schmallenberg virus seropositivity
From: First evidence of schmallenberg virus infection in southern Italy
Factor | n | Positive | % | 95%CI | χ2 | p-value |
|---|---|---|---|---|---|---|
Total | 812 | 329 | 40.5 | 37.1–43.9 |  |  |
Species | ||||||
 Cattle | 424 | 162 | 38.2 | 38.2–47.6 |  |  |
| Â | Â | Â | Â | Â | 1.96 | 0.161 |
 Buffalo | 388 | 167 | 43 | 38.1–48 |  |  |
Age | ||||||
 ≤ 24 months | 311 | 139 | 44.7 | 39.2–50.2 |  |  |
| Â | Â | Â | Â | Â | 3.65 | 0.056 |
 > 24 months | 501 | 190 | 37.9 | 33.7–42.2 |  |  |
Origin | ||||||
 Born in the farm | 436 | 174 | 39.9 | 35.3–44.5 |  |  |
| Â | Â | Â | Â | Â | 0.145 | 0.703 |
 Purchased | 376 | 155 | 41.2 | 36.2–46.2 |  |  |