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Univariable meta‐regression
| Predictors | Proportion (R 2) (%) | p value (RE) |
|---|---|---|
| Study period | 7.0 | 0.04 |
| Study location | 16.5 | 0.01 |
| Diagnostic technique | 0.0 | 0.70 |
| Species | 0.7 | 0.22 |
| Breed | 0.7 | 0.40 |
| Production system | 2.5 | 0.16 |
| Sample Size | 0.0 | 0.95 |
Proportion of effect of predictors on heterogeneity. All variables had a p < 0.01 in the FE model.
