TABLE 3.
Parameter estimates for nonmixture and mixture models
| Parameter (argument) | Parameter estimate (SE)
|
|
|---|---|---|
| Nonmixturea | Mixture | |
| θ1 (multiplicative constant) | 4.82 (0.061) | 4.2 (0.089) |
| θ2 (wt on CL) | 0.76 (0.49, 0.99) PL | 0.72 (0.098) |
| θ3 (age) | 0.48 (0.12) | 0.51 (0.088) |
| θ6 (long-term ventilator dependency) | 0.64 (0.1) | 0.62 (0.05) |
| θ7 (heart failure) | 0.86 (0.061) | 0.85 (0.066) |
| θ11 (creatinine) | 0.7 (0.088) | 0.72 (0.055) |
| θ12 (wt on V) | 0.31 (0.11) | 0.29 (0.093) |
| θ13 (additive constant) | NA | 1.59 (0.2) |
| θ14 (mixing fraction) | NA | 0.63 (0.094) |
| ω2 | 0.041 (0.014) | 0.0084 (0.013) |
| ς2 | 0.038 (0.015) | 0.032 (0.012) |
a
PL, 95% confidence interval constructed by the profile likelihood method; NA, not applicable.