Table 2.
Model parameter estimates from multivariate Cox regression models using time-dependent environmental parameters and pathogen detection selected by the stepwise procedure for young oysters.
| Parameter | Level | Df | Estimate | SE | χ2 | p | Odds ratio | 95% CI | |
|---|---|---|---|---|---|---|---|---|---|
| Origin | Hatchery | 1 | −59.865 | 9.809 | 37.2 | <0.001 | |||
| Wild | 0 | 0.000 | . | . | . | ||||
| OsHV-1 | 1 | 0.001 | 0.000 | 1257.8 | <0.001 | 1.00 | 1.00 | 1.00 | |
| V. aestuarianus (Va) | 1 | 0.128 | 0.198 | 0.4 | 0.516 | ||||
| Temperature (T) | 1 | 0.069 | 0.011 | 39.7 | <0.001 | ||||
| Salinity (S) | 1 | −0.019 | 0.018 | 1.1 | 0.301 | ||||
| Food level (F) | 1 | 0.354 | 0.013 | 730.9 | <0.001 | 1.43 | 1.39 | 1.46 | |
| Rainfall (R) | 1 | 0.156 | 0.017 | 88.3 | <0.001 | ||||
| Sea level Pressure (SLP) | 1 | 0.067 | 0.012 | 33.2 | <0.001 | ||||
| Wind speed (WNS) | 1 | 0.107 | 0.020 | 29.9 | <0.001 | 1.11 | 1.07 | 1.16 | |
| Origin × Va | Hatchery | 1 | 0.536 | 0.228 | 5.5 | 0.019 | 1.94 | 1.51 | 2.51 |
| Wild | 0 | 0.000 | . | . | . | 1.14 | 0.77 | 1.68 | |
| Origin × T | Hatchery | 1 | 0.121 | 0.010 | 143.6 | <0.001 | 1.21 | 1.19 | 1.23 |
| Wild | 0 | 0.000 | . | . | . | 1.07 | 1.05 | 1.10 | |
| Origin × S | Hatchery | 1 | 0.143 | 0.024 | 36.9 | <0.001 | 1.13 | 1.10 | 1.17 |
| Wild | 0 | 0.000 | . | . | . | 0.98 | 0.95 | 1.02 | |
| Origin × R | Hatchery | 1 | 0.140 | 0.019 | 57.1 | <0.001 | 1.34 | 1.31 | 1.38 |
| Wild | 0 | 0.000 | . | . | . | 1.17 | 1.13 | 1.21 | |
| Origin × SLP | Hatchery | 1 | 0.051 | 0.010 | 28.8 | <0.001 | 1.13 | 1.10 | 1.15 |
| Wild | 0 | 0.000 | . | . | . | 1.07 | 1.05 | 1.09 | |