Table 2.
Risk factor | Regression coefficient (B) and standard error (SE) | 95% confidence interval (95% CI) for regression coefficient | t-statistics | p-value |
---|---|---|---|---|
Intercept | 0.18 (0.02) | – | – | – |
The north-eastern province | 0.21 (0.02) | 0.17, 0.26 | 9.05 | < 0.001a |
Length of grazing period (months) | 0.03 (0.01) | 0.02, 0.04 | 6.35 | < 0.001 a |
Grazing grass > 50% of all roughage | 0.08 (0.02) | 0.04, 0.13 | 3.38 | 0.001 a |
Hay or haylage as main roughage | 0.05 (0.02) | 0.01, 0.09 | 2.03 | 0.043 a |
Grazing on pasture > 6 h | 0.06 (0.03) | −0.01, 0.12 | 1.67 | 0.095 |
Any grazing grass in roughage | −0.03 (0.03) | −0.08, 0.03 | − 0.89 | 0.373 |
Grazing on pasture | 0.03 (0.07) | −0.11, 0.17 | 0.38 | 0.706 |
a significant risk factor for herd-level exposure to Fasciola hepatica at a significance level of 0.05