Dear list,
I want o fit a shared gamma frailty model with the frailty specification in the
survival package.
I have partly left-truncated data and time-dependent covariates. Is it possible
to
combine these two things in the frailty function. Or are the results wrong if I
use data in the start-stop-formulation which account for delayed entry?
Is the frailty distribution updated in the left-truncated case?
Or is the frailty function only built for time-constant covariates and left
truncated data?
Thank you,
Stef.
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