Table 5.
Uni- and multivariate meta-regression model stratified by factors and BVDV prevalences at animal and herd level.
| Factors | Animal level (R2 univariate) | Herd level (R2 univariate) | ||||
|---|---|---|---|---|---|---|
| PI | VI | AB | PI | VI | AB | |
| No. of tested animals/herds | — | — | 2.1 | 16.8 | — | 10.8 |
| Country | 28.0 | 13.6 | 17.0 | — | — | 61.2 |
| Period | 23.0 | 3.3 | — | 8.4 | — | — |
| Production system | 12.6 | 6.1 | — | — | — | — |
| Age group | — | 10.8 | — | — | 24.4 | — |
| Vaccination | 10.0 | 4.0 | 3.2 | 4.3 | 6.0 | 5.5 |
| Clinical signs | 19.5 | 12.3 | 1.2 | — | 18.1 | — |
| Diagnostic method | 5.6 | 4.4 | 1.8 | — | — | — |
| Sample material | 1.9 | 28.9 | 3.3 | — | 17.0 | 4.1 |
| Level | — | — | — | 14.2 | 20.2 | 8.5 |
| R2 (multivariate) | 55.6 | 63.0 | 26.2 | 40.1 | 35.7 | 58.9 |