Table 10 GEE prediction of probability of a positive fPCR test result (> 1 × 103 genomes / mL) for cows that tested positive (≥ 50 EU in any one of 4 ELISA tests conducted in parallel) for antibody to MAP in a study on a NZ pastoral dairy farm over 4 seasons (2013–2016)
Predicted probability (95% CI) of testing fPCR positive | |||
|---|---|---|---|
Season | Primiparous | Multiparous | p-value of difference |
2013–2014 | 48.1% (24.2–95.4) | 20.3% (14.6–28.1) | 0.026 |
2014–2015 | 18.3% (3.9–86.1) | 35.9% (23.0–56.1) | 0.413 |
2015–2016 | 42.9% (33.3–88.3) | 28.7% (13.0–63.5) | 0.580 |