Computes the event probability in the experimental group based on the event
probability in the control group and a specified hazard ratio, assuming
proportional hazards.
Arguments
- p0
Numeric scalar or vector. Probability of an event in the control group (between 0 and 1).
- hr
Numeric scalar or vector. Hazard ratio (must be > 0). Must be the same length as p0.
Value
Numeric. The probability of an event in the experimental group.
Details
This is useful for sample size calculations, for example in PASS (TM), which does
not automatically adjust the event rate for the experimental group.
Examples
prophr(0.05, 0.6)
#> [1] 0.03030722
