convertedRate: Scheduling interim analyses in clinical trials
Description
Function convertedRate converts a drop-out rate from one period to another. If the drop-out rate is defined for
w1 weeks convertedRate yields the drop-out rate for w2 weeks.
Usage
convertedRate(r, w1, w2)
Arguments
r
rate between 0 and 1 (0 < r < 1)
w1
number of weeks for which r is defined
w2
number of weeks to which the rate shall be converted
Value
The converted drop-out rate.
Details
convertedRate is an auxilliary function that converts drop-out rates for different time periods.
The function can be used in order to convert drop-out rates required for function treatment. Function
treatment requires the drop-out rate for the respective treatment duration as input. Typically known annual
drop-out rates can be converted to the respective rate for the treatment duration accordingly by setting w1
to 52 and w2 to the respective treatment duration.
See Also
treatment for simulating the treatment duration for a given recruitment scenario