| Association parameter | P-value | No-frailty Log-likelihood | Log-likelihood |
Gamma | 0.067 | 0.0132 | −5007.947 | −5005.483 |
Positive Stable | 0.021 | 0.0226 | −5007.947 | −5005.942 |
Inverse Gaussian | 0.065 | 0.0137 | −5007.947 | −5005.511 |