psrwe_borrow: Get number of subjects borrowed from each statum

In olssol/psrwe: PS-Integrated Methods for Incorporating RWE in Clinical Studies

Get number of subjects borrowed from each statum

Description

Based on PS distances or number of current control subjects, split the total number of subjects to be borrowed from the external data source to each stratum

Usage

psrwe_borrow(
  dtaps,
  total_borrow,
  method = c("distance", "inverse_distance", "n_current", "n_external"),
  .drop_arg_fml = FALSE,
  ...
)

Arguments

dtaps	A class PSRWE_DTA or PSRWE_DTA_MAT object.
total_borrow	Total number of subjects to be borrowed
method	Method to split total_borrow for a class PSRWE_DTA object, which can be based on distance (method = "distance") or inverse distance (method = "inverse_distance"). Other possible options include "n_current" and "n_external" that use the proportion of stratum sample size based on the current and external data, respectively. Ignored for class PSRWE_DTA_MAT object.
.drop_arg_fml	internal use to drop arguments and call, this is only used in cjk.
...	Additional parameters for summary.PSRWE_DTA.

Value

A class PSRWE_BORR list. It appends the following items to the dtaps:

Proportion

Proportion splitting the number of total borrow among strata.

N_Borrow

The number of to be borrowed subjects in each stratum.

Alpha

Weight parameter value in each stratum.

Examples

data(ex_dta)
dta_ps <- psrwe_est(ex_dta,
                     v_covs = paste("V", 1:7, sep = ""),
                     v_grp = "Group",
                     cur_grp_level = "current")

ps_borrow <- psrwe_borrow(total_borrow = 20, dta_ps)
ps_borrow

## Use different similarity metric
ps_borrow_omkss <- psrwe_borrow(total_borrow = 20, dta_ps,
                                 metric = "omkss")
ps_borrow_omkss

olssol/psrwe documentation built on July 17, 2024, 4:06 p.m.