Table 4 Features of flexible parametric survival models reported by the prognostic model studies
Features of flexible parametric survival models | n | (%) |
|---|---|---|
Benefits | ||
 Additional insights of prognostic factors versus other survival analysis models | 1 | (8.3) |
 Compute additional parameter estimates versus other survival analysis models | 1 | (8.3) |
 Extrapolation using the linear tail of the restricted cubic spline | 2 | (16.7) |
 Flexibly fit (/model) the baseline function | 4 | (33.3) |
 Improved model accuracy | 5 | (41.7) |
 Model time-dependent effects | 1 | (8.3) |
 Validation in other settings | 2 | (16.7) |
 No reported benefits | 3 | (25.0) |
Limitations | ||
 Overfitting | 1 | (8.3) |
 Difficult to interpret models with more than one time-dependent effect | 1 | (8.3) |
 No reported limitations | 10 | (83.3) |