Ratio of Average Treatment Effects

Computes the ratio of two Average Treatment Effects (ATEs), typically comparing the ATE for a specific cause (e.g., RMTL due to cause 1) to the ATE for the total RMTL.

Usage

ratioATE(rmtl, rmtl1, h = NULL, null = 1)

Arguments

rmtl

Object containing the ATE for the total RMTL (from resmeanATE).

rmtl1

Object containing the ATE for the specific cause RMTL (from resmeanATE).

h

Transformation function (e.g., log) applied to the ratio. Default is identity.

null

Value under the null hypothesis for the ratio (default 1).

Value

A list containing:

ratioG

Ratio based on the simple IPCW estimator.

ratioDR

Ratio based on the double robust estimator.

Details

The function transforms the estimates (e.g., using log) to compute the ratio and its standard error using the delta method and the joint influence functions.

See also

resmeanATE

Author

Thomas Scheike

Examples

data(bmt); bmt$event <- bmt$cause!=0; dfactor(bmt) <- tcell~tcell
out <- resmeanATE(Event(time,event)~tcell+platelet, data=bmt, time=40, outcome="rmtl")
out1 <- resmeanATE(Event(time,cause)~tcell+platelet, data=bmt, cause=1, time=40, outcome="rmtl")
ratioATE(out, out1, h=log)