| Count model coefficients (Poisson with log link): | Estimate | Std. Error | z value | p-value |
| (Intercept) | 0.67656 | 0.57662 | 1.173 | 0.24066 |
| EID Testing Point |
|
|
|
|
| 2 - 9 months | 0.63982 | 0.21034 | 3.042 | 0.00235** |
| 9 - 12 months | 0.20265 | 0.28420 | 0.713 | 0.47582 |
| 12 - 24 months | −0.05207 | 0.35466 | −0.147 | 0.88328 |
| Above 24 months | 0.27111 | 0.25325 | 1.071 | 0.28438 |
| PCR Type |
|
|
|
|
| Confirmatory PCR | −9.26276 | 103.50896 | −0.089 | 0.92869 |
| 2nd/3rd PCR | 0.39130 | 0.54995 | 0.712 | 0.47677 |
| Zero hurdle model coefficients (binomial with logit link) |
|
|
| : |
|
| Estimate | Std. Error | z value | p-value |
| (Intercept) | −4.0023 | 0.7556 | -5.297 | 1.18e−07*** |
| EID Testing Point |
|
|
|
|
| 2 - 9 months | 0.7273 | 0.4259 | 1.708 | 0.08768 |
| 9 - 12 months | −0.2469 | 0.5167 | −0.478 | 0.63274 |
| 12 - 24 months | −0.3400 | 0.5508 | −0.617 | 0.53702 |
| Above 24 months | 0.2962 | 0.4643 | 0.638 | 0.52350 |
| PCR Type |
|
|
|
|
| Confirmatory PCR | 2.1431 | 1.3091 | 1.637 | 0.10161 |
| 2nd/3rd PCR | 2.0897 | 0.7344 | 2.845 | 0.00444** |