fastml (version 0.7.0)

compute_rmst_difference: Compute Difference in Restricted Mean Survival Time (RMST)

Description

Calculates the difference in RMST between "low" and "high" risk groups up to a time horizon \(\tau\). Groups are defined by median-splitting the risk_vec.

Usage

compute_rmst_difference(
  time_vec,
  status_vec,
  risk_vec,
  tau,
  surv_mat = NULL,
  eval_times_full = NULL,
  model_type = "other"
)

Value

The RMST difference (RMST_low - RMST_high), or NA_real_.

Arguments

time_vec

Numeric vector of test times.

status_vec

Numeric vector of test statuses.

risk_vec

Numeric vector of predicted risk scores for test data.

tau

The time horizon \(\tau\) for integration.

surv_mat

Optional. A matrix of individual survival predictions (rows=subjects, cols=times) used for model-based RMST calculation.

eval_times_full

Optional. A numeric vector of time points corresponding to the columns of surv_mat.

model_type

Optional string (e.log., "rstpm2", "flexsurv") indicating if a model-based RMST calculation should be attempted.