pw_exp_impute function

Imputes time-to-event outcomes.

Imputation of time-to-event outcomes using the piecewise constant hazard exponential function.

pw_exp_impute(time, hazard, maxtime = NULL, cutpoint = NULL)

Arguments

• time: vector. The observed time for patient that have had no event or passed maxtime.
• hazard: vector. The constant hazard rates for exponential failures.
• maxtime: scalar. maximum time before end of study.
• cutpoint: vector. The change-point vector indicating time when the hazard rates change.

Returns

a dataset with simulated follow-up time (time) and respective event indicator (1 = event, 0 = censoring)

Examples

pw_exp_impute(time = c(120), c(0.005, 0.001), 110, 40)
          pw_exp_impute(time = c(10, 20, 30), c(0.005, 0.01, 0.02), 100, c(40, 80))
          pw_exp_impute(time = c(40, 30), c(0.005, 0.01), 120, c(50))