Table 2 AIC values of the parametric frailty models
| Baseline hazard function | Frailty distribution | AIC |
|---|---|---|
| Exponential | Gamma | 5534.547 |
| Inverse-Gaussian | 5535.706 | |
| Weibull | Gamma | 5052.727 |
| Inverse-Gaussian | 5014.042 | |
| Log-logistic | Gamma | 4997.691 |
| Inverse-Gaussian | 4941.630 |