Table 4.
Estimated individual-level (mixed effects) structural parameters αi and βi on original scale. Units are the same as in Table 2. The parameters in the Weibull, gamma, and lognormal models have different meanings and are neither related nor comparable. Subscript i indicates individual parameter.
| Model | Parameter | Subject | Mean | CV (%) |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ||||
| Weibull | αi | 8.07 | 4.99 | 5.33 | 5.38 | 6.62 | 2.86 | 6.41 | 4.99 | 5.58 | 27.24 |
| βi | 135.87 | 128.11 | 123.96 | 125.17 | 132.51 | 109.37 | 130.34 | 119.70 | 125.63 | 6.61 | |
| Gamma | αi | 46.38 | 21.01 | 21.99 | 22.79 | 33.92 | 7.83 | 31.51 | 19.28 | 25.59 | 45.13 |
| βi | 2.77 | 5.65 | 5.23 | 5.10 | 3.67 | 12.72 | 3.87 | 5.75 | 5.59 | 54.83 | |
| Lognormal | αi | 4.84 | 4.76 | 4.72 | 4.74 | 4.81 | 4.56 | 4.79 | 4.68 | 4.74 | 1.87 |
| βi | 0.023 | 0.042 | 0.045 | 0.042 | 0.029 | 0.113 | 0.032 | 0.052 | 0.047 | 59.42 | |