get_cumu_coef {pammtools} | R Documentation |
These functions are designed to extract (or mimic) the cumulative coefficients usually used in additive hazards models (Aalen model) to depict (time-varying) covariate effects. For PAMMs, these are the differences between the cumulative hazard rates where all covariates except one have the identical values. For a numeric covariate of interest, this calculates Λ(t|x+1) - Λ(t|x). For non-numeric covariates the cumulative hazard of the reference level is subtracted from the cumulative hazards evaluated at all non reference levels. Standard errors are calculated using the delta method.
get_cumu_coef(model, data = NULL, terms, ...) ## S3 method for class 'gam' get_cumu_coef(model, data, terms, ...) ## S3 method for class 'aalen' get_cumu_coef(model, data = NULL, terms, ci = TRUE, ...) ## S3 method for class 'cox.aalen' get_cumu_coef(model, data = NULL, terms, ci = TRUE, ...)
model |
Object from which to extract cumulative coefficients. |
data |
Additional data if necessary. |
terms |
A character vector of variables for which the cumulative coefficient should be calculated. |
... |
Further arguments passed to methods. |
ci |
Logical. Indicates if confidence intervals should be returned as well. |