Trim persons by propensity score

Source: R/PsFunctions.R

Use the provided propensity scores to trim subjects with extreme scores.

trimByPs(population, trimFraction = 0.05)

Arguments

population

A data frame with the three columns described below

trimFraction

This fraction will be removed from each treatment group. In the target group, persons with the highest propensity scores will be removed, in the comparator group person with the lowest scores will be removed.

Value

Returns a tibble with the same three columns as the input.

Details

The data frame should have the following three columns:

  • rowId (numeric): A unique identifier for each row (e.g. the person ID).

  • treatment (integer): Column indicating whether the person is in the target (1) or comparator (0) group.

  • propensityScore (numeric): Propensity score.

Examples

rowId <- 1:2000
treatment <- rep(0:1, each = 1000)
propensityScore <- c(runif(1000, min = 0, max = 1), runif(1000, min = 0, max = 1))
data <- data.frame(rowId = rowId, treatment = treatment, propensityScore = propensityScore)
result <- trimByPs(data, 0.05)
#> Population size after trimming is 1900